IStroboSoft App Reviews

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Simply the best.. This tuner is incredible. It has helped me set the intonation on all 5 of my guitars with a degree of accuracy I could have never imagined. And for $10. It’s a no brained. Buy the app, you won’t regret it. I recommend the guitar tuning sweetener as well. Finally, if you want this tuner to preform like it’s in a lab spring for the adapter cable. You can plug your guitar directly into the phone (gotta use that stupid dongle) and it will take all the extraneous noise out of the act of tuning your guitar. Along with the money spent on the app, the $13 for the adapter was money well spent. I don’t care how good your sense of pitch is, this app, especially with the the adapter, is simply better.

Really accurate tuner. Simply put, if you want an accurate tuner in your pocket everywhere you go, this is the right buy.

Temperaments. Hi, just wanted to inform the developers do double-check the cent inputs for some of the temperaments, as well as allow users to create their own temperaments or see how those available are constructed using a circle of tempered or pure fifths and thirds, allowing users to play around with that. For Vallotti, I’ve noticed A# seems to be way too flat. The app is not bad.

Terribly disappointed. What a waste of $10. This thing can’t find Low E on a guitar and can only find other notes for a second before going blank. It’s like it can’t get enough signal although I tried the so called Boost option. Same results on iPhone and iPad. Hasn’t been an update in two years. Maybe it’s time. Until then can I get my money back?

Great tuner. I bought this tuner primarily for intonation my instruments. I also bought the jack to plug a 1/4” instrument cable into. The large display on my iPad is perfect for the bench and makes dialing in tuning easy. I also tune with the iPad mic when practicing (no other instruments interfering with the input).

Love it, but.... Veteran band director and orchestral musician here. This is a great tuner. I find it very accurate and reliable. Put it up side-by-side next to my Peterson strobe tuner and they match perfectly. The $10 price is a bargain! HOWEVER, the app throws adds up over the app preventing you from using it once in a while. Why? I already paid for the app. Get rid of the adds, please.

Best tuner I’ve tried. This tuner is worth the money. I play trombone, so when I practice, I’m essentially tuning my brain and muscle memory more than my instrument. Sometimes I end up with strange tendencies that can be difficult to work out. This tuner is clean, accurate, and so visually obvious I don’t have to look at it directly, which makes this process much easier. I’d recommend it to any musician, especially wind players.

THE GREATEST TUNER. The action of this is the most accurate and the least “erratic” of the tuners I’ve used... The result is that it takes 1/4 of the time getting each string in tune. I never write reviews but I rely on them heavily for my own purchases... I’ll tell you: this works so well for me that I wanted to pass it along. This thing blows away anything else I’ve tried. I record acoustic music and sold my rack mount Korg tuner, this app works infinitely faster and perfect results.

No other tuner makes me hate myself this much.. 5/5, would buy again.

Works fine, reasonably customizable. The tuning is as precise as I'd expect it to be, since I use my iPhone's internal microphone. The interface is easy enough to use and there are options for tweaks to appearance and mode of function. I'm satisfied and would buy it again.

Nice tuner to have in my pocket. Wanted a tuner to set intonation. Did it by ear and was pretty close. But was still off a bit and wasn’t happy. (Guitars need a well tempered tuning.) The iStroboSoft with guitar sweetener showed me where I was off and needed to be, within 1cent. Also a great tool to have when trying out a new guitar. Tuner fits nicely in the pocket. I find that the room needs to be really quiet to do it right. For $16 with the sweetener it’s pretty good. Thanks for reading my review. Update: I found that setting the intonation with the sweetener on actually made the intonation come out wrong. I couldn’t find a way to shut it off so I set the intonation with my old boss tuner, then open tuned with the strobe sweetener on. That works much better.

Best Tuner For Me. I believe this tuner works as good as any other tuner out in appville. It is really in the eye of the beholder. If it works for you, use it. If it doesn’t, use another. Peterson has been the staple of tuning for luthier’s for decades. Period.

The Best Tuner, Hands Down. iStroboSoft is far and away the best tuner for iPad and iPhone. I’ve used it for years on all types of guitars and even on my sons’ low brass instruments. Peterson strobe tuners are legendary and this app is worth every penny.

Best tuner app. I have always loved Peterson tuners, so I was really happy to see they made a tuner app. This completely lives up to their name. I’ve tried many others on the App Store and this is definitely the most accurate and professional. Love it!

Finally updated!. Yes! The best tuner has finally been updated for new phone screen sizes and hardware 🥳🤩😎🤓

BAAAADDD. Using my iPad 2020s microphone for my acoustic yields zero results. Hardly functions at all. Barely rotates with noise cancelation on and off and boost on and off. Sweeteners are nice but don’t make it function any better. I only use strobe tuners, specifically a strobostomp that is fantastic. Idk why this app is this bad. Maybe I need to use a D/I box to get it to function correctly but that defeats the purpose of it being portable. DEFINITELY NOT WORTH THE MONEY

Works but.... I remember my 8th grade orchestra teacher used to tune us 1 by 1 with a physical tuner just like this one so I was excited to see that this now exists for my iPhone! BUT..... I had to pay extra for the functionality to tune each violin string / had to download a sweetener. And After I dropped $15 i still don’t get all of the advertised features, plus the app isn’t optimized for iPhone X. So I that’s why I have a 2 star review. Thanks

The last software tuner you’ll ever need.. Been using this app for about 5 years now and no app comes close to the tuning accuracy of this one. I’m a session musician (bass, guitar, piano) and an educator and I use this app almost daily. I also setup and repair bass guitars and use it to intonate strings which requires very precise tuning and the tuner handles it superbly. Peterson also sells an adaptor to plug in guitars to your phone/tablet; when I’m on stage I use the tuner out of my amp into my phone and it works perfectly. The only feature I’d love to see implemented is an Apple Watch app. It doesn’t need to have the strobe screen but just the note and cents would suffice.

Amazingly accurate. I’ve used this to perform intonation adjustments on guitars, basses and Chapman Sticks directly connected to my phone or iPad. Because I route my sound through an audio interface and AUM on the iPad, this app is always available and my go-to tuner. I have a very good clip-on, but this app is always my first choice as it’s more accurate. Peterson has a dongle for direct connection, but you need another adapter between that dongle’s TRRS plug and either lightning or USB-C. It would be nice if Peterson also offered those as I’ve purchased several, and only found one that works on my iPhone. None that work on the iPad, but the audio interface solved that problem for the iPad. This app is first-rate & worth every penny!

Great tuner. More sensitive that I ever thought a tuner could be. This is a killer tuner. Super sensitive have to use it with the noise filter on or it tries to tune everything in the room. Spent 9.99 and was not disappointed.

Excellent. The best tuner. Senses notes down to cents, very accurate. This is crucial for those learning guitar, your instrument needs to be tuned properly… This tuner is suitable for setting the intonation on guitar. Other app based tuners are not…

best tuner app out there. Far and away the best and most useful tuner app. Got it due to how much I liked the clip on one, (which is fantastic for guitar type headstocks but could use a little work for violins). This app is that plus some additional strobe bands. Even without the add-ins it’s the best tuner app, and the frequency analysis tools are indeed nice add-ins. Love it.

The best!. I absolutely love this tuner, the most accurate available. Other tuners get you in the ballpark, this is dead on. Worth the money, amazing piece of technology, a pleasure to use.

Great app!. I loosen the strings on my acoustic guitar when I’m not using it for a long time. This app together with an AppClip allows me to quickly get playing again.

Indispensable!. Way better and more accurate than any tuner I’ve used. This is my go-to now for recording and guitar setup.

Excellent. Excellent all around, coming from a great company very much caring about sound. Thank you! Simple and really effective. I am using the string (violin) sweetener and it works perfectly.

Absolutely disappointed. I trust the Petersen name as it has been in the tuner business for many years. But this product is expensive, hard to use, and deceptively advertises sweetened tunings. I decided to tune my Martin with it, just to see. This guitar has to be sweetened to sound good, I have been using my ears for that since I got the instrument 13 years ago. I was expecting an experience that would make it quicker and ‘on the fly’ for me to cleanly tune my guitar. Epic fail. It makes my guitar sound out of whack, the strobe on the far right never stops completely which gives me an insolvent answer whether it is in tune, sharp or flat. I have used the same free PanoTuner app since 2013 with excellent success. It is consistent, simple and even worth the paid version to support the developer. I am requesting a refund and hoping Apple will help me out of this. Back to the drawing board. Very dissatisfied. Petersen, please rewrite this antique of an iOS app, optimized for the latest iOS devices. Release it for free with the reworked sweetening as an in-app purchase. This was a disappointment and gives me second thoughts on buying Petersen products in the near future.

Tools upgrade is excellent. Oscilloscope and spectrographs upgrade is well worth the $10 upgrade and very useful for sound geekery far beyond instrument tuning. You can see waveform shapes, harmonics, and which music note all on the screen at once.

Has the developer abandoned this great app?. The main thing is that the app is very accurate and easy to read. I prefer it to most others for its simulation of a stroboscope...it seems to be more precise than the other app tuners I’ve tried However, the developers haven’t given it much love in a couple of years. It hasn’t been updated for newer iPhones, so visually it looks a bit shrunken. And I find that it freezes and crashes more often than any other iOS app I use. Developers, please step it up because this ought to be the reference standard! And users, beware that you’d be buying something that may not have much of a future...

Money Well Spent. This app is probably my favorite app. I use this tuner often. It is extremely accurate and easy to use. After I purchased the app my iPhone died and I was happy to see it was restored through the Cloud when I purchased another phone. This truly is a great tuner.

Does what it is supposed to do. The Peterson iStrobosoft software works as a strobe tuner for your iPhone. In my case, I put the sweetend tunings (because of licensing) on my old 5S, but I just use it for Music and Astronomy apps. I wish I could get some kind of deal to put them on both phones. As far as what is missing out of a sweetend tuning, how about some suggestions for 8 and 9 string guitars. Will update this review later to see how well it works with my Apogee Jam. Yes, it works great with the Jam. I also find the tuner is indeed very accurate.

Used to be good. Completely useless now.. This app does not seem to pick any sound unless it is played extremely loud. I was able to make it work when I hold my phone immediately next to the guitar strings. Apparently this app is not updated and smth went wrong as iOS updates were piling up over the years. Now this is not a tuner app.

Disappointed. Not what I was hoping for. It has a difficult (at best) time figuring out what not I am playing, then jumps all over the place and can’t decide what octave of that note I am paying. Really not a good tuner. I got this specifically to do intonation and it’s not up to the task of jumping between octaves when doing so. The reputation and hype of these tuner precedes them, and is not at all how they are.

The Best. This is a. Excellent app. Just like the original big Peterson strobe tuner I still have. Every musician I have shown it to had bought the app. It is extremely accurate, reliable and easy to use. I have several tuners but I rely on this one. It is always with me on my phone or iPad. 👍👍

Almost Perfect. Bottom line, this tuner is everything the pros say about it. Since I only play guitar as a hobby (I find it to be somewhat less confounding than golf), I can’t add anything to the “learnedness” of their comments. I’m sure I’m only scratching the top layer of the surface of the capabilities of this app too. I do know it’s more accurate than any other tuning gadget I’ve ever used, including an A tuning fork, a gizmo that looks like a weird harmonica (guitar pitch pipe), the Intellitouch clip-on, and built-ins for my guitars and amps. I need to read up on some of the other things it can do, because I’m not doing anything other than tuning my guitars with it. I was going to give it 4 stars instead of 5 because the screen often jumps around uncontrollably, especially when tuning the low E string. It don’t remember it happening when I first got the app (though it might have). That means I have to guess at where the sweet spot is a lot of the time. This happens with all of my guitars. It’s probably something I’m doing wrong because I’ve not read about anyone else having this problem. Since it’s probably due to “user incompetence”, I didn’t feel right taking away a star from a review that I’m probably not even qualified to write in the first place. I need to look into that cable I read about in some of the reviews. It’s not usually loud when I’m tuning, but I’m wondering if that would fix my “jumping around” problem.

Not updated for X/XS/XR displays. For an app that costs quite a bit more than the average mobile app (not including in-app purchases), there is no excuse for it to not be updated for the X/XS/XR displays 1.5 years after the X was released. Especially when updating apps for the newer displays does not take a lot of work.

Really, really versatile. What’s lovely about this tuner is that, unlike other apps that are obviously designed to tune a select few instruments, this one makes no assumptions about what you will tune with it. You want to tune a violin? It can do that. You want to tune a frame drum? It can do that too, and it’ll show you the drum’s harmonics as you go, so you don’t get a muddy, uneven tone. Minus one star because it hasn’t been updated for about three years now. It STILL doesn’t fill the screen on an iPhone X. Doesn’t really impact the functionality, I guess, but how hard can it be to fix something so trivial?

The. Best. App. Ever.. I have pedal tuners on my big and small boards. They are the ok but was frustrated that often had trouble dialing in-tune that pleases the ear despite what the dial says. Discovered this app and ten minutes later tuning nirvana and discovered one guitar needs a serious set up. Easy to use and so accurate. Best $10 spent ever. Just get it!

BEST TUNER, Just GET IT!. Finnally a tuner that does not flash and jump around and leave you gussing. So easy to slow down the strobe. Makes so much sense to pluck a string and let it resonate while the string is tuned. Very sensitive using my iPad Pro. Having cents show is a great feedback that further increases confidence. I've found the string's tuning jumps a few cents after letting go of the tuner. Easy to get use to and anticipate so you end up with tuining within fractions of cents. Also, never made sense to bang away at the string to keep the volume loud enough for my old clip on, or in line tuners. Not using a pick was a piece of information that didn't jump out at me. My local luther had made a comment that my guitar was tuned sharp. I had tuned my brand new guitar with a pick before heading to the luther.

I use it to intonate my guitars.. This app is the best tuner I’ve ever used! The strobe interface is what makes this tuner easier to use compared to my other ones. Yes, it is very accurate and sensitive just like how they claim. I was unsure about it because I didn’t have an interface, so I’m just using my phone’s onboard mic. Everything works with the built in mics, and you get the option on boosting the signal with some type of noise reduction option. The only downside for me is not being able to directly plug into the tuner, but that is just my own fault. I highly recommend this app!

Please fix the audio!. I’ve been using this app everyday for my practice routine and I have loved it. It’s extremely reliable and the tools are great... but why can’t I use a metronome app at the same time? I don’t know if it’s just me, but while playing audio from another app (like a metronome app), when I switch to iStroboSoft the audio becomes significantly quieter, to the point where I can’t hear it anymore even at max speaker volume. Also, when listening to a metronome with AirPods, they disconnect when switching back to this app! Developers, please fix this problem so I can enjoy your app with my new wireless headphones.

Luthier’s Review. I have been a luthier for 30 years and have been using my Stroboconn for that long. I wanted something equivalent and portable. I wrote my first spectrum analyzer (FFT) for hardware I made in 1984 running on a Mac+. I have a lot of expectations when it comes to this software. With in app purchases I had to spend $30 to replace the mechanical strobe which seems expensive for an app. It does, however, function very well. Make sure to calibrate it. I also spent an extra $10 for having the spectrum features replacing my Mac+. (Well worth it.) I would really like a power meter feature. Beyond tuning I often need to measure string to string balance in piezo pickups. The other feature I would love to have is a waterfall display of the spectrum. It would be an easy add.

Amazing Value. Buy the app, buy the Peterson adaptor cable for your iPhone, you have a strobe tuner for under $25. Amazing value and worlds better than the boss tuner I was using before and my guitars really come alive after tuning up with this degree of accuracy. Once you use this you’ll see what you were missing if you’ve never used a strobe tuner before. Unbelievable value, don’t think I’ve written a review for an app before but this is just outstanding!!

Worth the money for sure.. As a beginner a properly tuned instrument is super important and this app makes sure you are dead on accurate.

Needs new update!. While I have thoroughly enjoyed using this app through the years for it’s accuracy and convenience—I believe there are currently a few bug fixes that need to be address to improve compatibility with current iOS. My app has been dodgy ever since the last few iOS updates in my iPhone 11; I switched from the iPhone 11 to the iPhone 14 Pro recently, and it still has been very jumpy—it won’t lock in on the notes, even with the proper sweeteners and noise filters engaged. It also would be great if an updated dongle was offered—one that employed a Apple Lightning connector.

Untested portions of app. I tend to lose faith in a developer that doesn’t test all functionality before release. There is a flaw with the in app purchase for extended ranges. iTunes is working just fine for other apps and music and some of the in app purchases, but not for extended range. Is it really that hard to test functionality before release? It causes me to wonder what else wasn’t tested. Low and high ranges with the app don’t work. Keep your handheld tuners!

Guitar hobbyist. Peterson is the best, Love the Sweetened tunings for my acoustic guitar. However, I have to use GuitarTuna first before IStroboSoft can recognize the note or string correctly , then fine tune the guitar. This is especially true with cheaper guitars . “Peterson” please make an easy mode for the standard tuning we use 90% of the time. E A D G B E mode for a six string guitar only, all other notes are just off at this point.

Easy to use. I own a Peterson 250 model an after using this one I’m very impressed, very handy

Super great... Except one thing. I see this app hasn't been updated in quite a while which is fine, because I think it's actually pretty close to perfect. I bought the hardware version (stroboplus hdc) and have a couple stroboclips, but honestly I prefer the app... The display is quicker and more accurate than the stroboplus and it's more powerful than the clips. HOWEVER, at some point, it seems to have lost the ability to rotate upside down, which is something I used all the time! It made it easy to have a power cable coming out of my phone and still have the display in portrait mode, offering the most visibility of the strobe. It was super easy to have it plugged in and sitting on a music stand or desk. Also I feel the mic pointing upward helped the tuner hear the instrument much better. Please bring this feature back!!! It seems like such an easy fix! Sincerely, a longtime user and fan

Really great tool. I looked into and tried clip on tuners like the Snark. It worked well but I saw reviews that suggested some finishes were marred by the clip on over time. I saw the Peterson website and pondered on which tuner would work best for me with classical and steel string guitars. Then I saw the iStroboSoft tuner. Fascinated, I purchased and used the tuner with my iPhone and iPad. It has become my tuner of choice. I really like how it handles the job of fine tuning my guitars. I tried the sweeteners but finally I settled on the normal setting and use the “cents” setting. I find on most of my guitars the intonation on the third string is a bit finicky . If you just recognize this, you can kind of view the tuning bars and cent values to create your own “ visual” sweetener values. Bottom line- get it if you are in a quiet setting to use it. I actually think there is a clip for this that allows tuning in noisy environments? For me, I like playing at the end of day when all is peaceful and quiet. This tuner is the first step in practicing every day. Great software!!! Great app- period.

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Great tuner. Well worth it. Easy to use and I always have it with me. Can't fault it

Total Ripoff. From the images it looks like you are getting all the tools. You are not! Go get a free version elsewhere. The upgrades would bring this app to over $100aud. All you get is a regular fake stupid strobe tuner screen with the usual configurations. It's way over priced at $15 and ridiculous bate-and-switch for $100+

Great. This is exactly what it makes out to be, great value, if you want a tuner buy this above all others.

The most accurate tuner on the App store.. Absolutely fantastic tuner, blows my old hardware units away for accuracy - thx Peterson!

Accordion Sweetners. I find the base app excellent and can’t add anything to existing reviews. The Accordion Sweeteners however proved very disappointing. Aside from “Cajun” about which I know little, there are three sweeteners for tuning three banks of treble reeds, ie a sharp set, a flat set and for the middle set you tune to concert pitch. That’s a pretty simple approach but so be it. My gripe is that the three fixed settings give you (in cents): “Dry”: -0.5 / 0 / +0.5 “Medium”: -1.5 / 0 / +1.5 “Wet”: -25 / 0 / +25 Those who know will understand the severe tuning limitations given the above. I wish I’d saved my $14.95.

I love this tuner. I have several tuner apps on my mobile phone, but this one really is the most accurate for me, I also purchased the guitar and bass sweetener and set it to ACU and after tuning, I can hear that my acoustic guitar is really in tune, compared to other tuners that doesn’t sound right to me even after tuning. Now, I’m using the James Taylor’s flat tuning method and it sounds great. Thanks, Peterson for bringing this wonderful tuner to mobile app.

OS4 fix. Thanks for the speedy OS4 fix guys. The best tuner works perfectly again now. Why is it the best? It locks on perfectly to every pitch from the deepest note on the double base to the highest note on the piccolo, responds very quicky to pitch variations, and the display is stable & easy to read. It also gives highly accurate readings when compared to known reference pitches. The clear winner. Micsmi

Great for set-ups. Stroboscopes have always been the instrument of choice for luthiers doing precise bridge set-ups. This Strobosoft tuner achieves the same degree of accuracy (or better) at a small fraction of the price of the original. Fantastic for players of instruments with floating bridges, e.g. banjo players. Fantastic!

Great Tuner. I use it to tune my Rhodes. Works great. I haven't tried the sweetened tunings yet. You have to buy all the keyboard ones together and it's a bit pricey (less pricey than hardware though).

Superb for intonation setups. I have used this handy strobe for many years now with guitar setups and is every bit as good as the more pricey hardware version. Extremely accurate and reliable. It works well at gigs too- i would sit my phone on top of my rig and just use it via the iphone mic. I even use it to check my own singing pitch and that of other sound sources

Great Product. Where are the sweetened tunings please!

IStroboSoft. Four stars because it’s accurate and will do A=432. Knocked a star off as I think $15AUD is a bit excessive.

Best tuner you can buy. Sadly the in app purchases are very expensive. Even for the company that makes the best tuners in the world, it's a shame they hide how much the 'full featured' app really costs. I bought this on a $1 Black Friday sale but they ended up charging my account full price ... Beware.

this app is gold. buy it.. i have often wanted to try one of petersons strobe tuners to see how they work, but couldn’t justify the price ($400+AUD). when i saw it in the itunes store at a price significantly less than the hardware version i jumped at it. i play an old casino, and it has always been difficult to tune well. this app is easily the best tuner i have ever tried and i have tried quite a few. my casino is sounding better than ever, and that was a very pleasant surprise. pros: -unbelievable tracking. the algorithm used is amazingly accurate and fast. a lot more accurate than my Boss TU-12H. -even when the string rings out it still manages to hold the tuning accurately (most others don’t). -works great with the 1/4 inch adapter. i bought the adapter from their website for $12.99USD + $4.95USD shipping (to Australia). -works great with alternate tunings. i play half a step down. -it's pretty. a lot prettier than the foot pedal version. cons: -the scrolling interface is a new way of thinking about tuning for me. i still sometimes turn the tuners the wrong way. -screenshots need to be updated in the itunes store. the current pics shown are from an older version. -in the settings (info) page you have to tap to the left of the blue arrow (not on the blue arrow) to select a setting, i find this irritating. overall: this app is gold. buy it. buy the adapter cable. put your old tuner on ebay.

Impressive range and accuracy!. Great range on the piano, and tunes my double bass as well. Very Impressive

THEPERFECTSTRANGER. FANTAST!CO Real tuning is no longer a chore but a Joy. * Shane E Murray Australien

Godsky. Brilliant app for tuning,considering the cost of the Peterson tuners

Precise & Perfect!. Hving owned the StroboStomp and StroboFlip both costing hundreds each, I was initially skeptical as to whether a $13 app could perform with the same accuracy. Needless to say I was blown away at the precision and have since sold my $300 StroboFlip for this $13 equivalent. Peterson have done it again!

Sensational. Quick, amazingly accurate and very easy to use. Can even cut through a loud band warming up with the noise filter on. A great purchase and one of the best apps on my phone.

An Amazing Tuner - Best App Yet!. I was so excited to find that I could use my iphone as a tuner, and tried several of the apps available but couldn't believe it when I saw Peterson has made the StroboSoft. This has got to be the best app I've found yet! I spend around $450AUD on a Strobostomp Pedal Tuner (makes this 'expensive' app look very cheap) for guitar and am so very happy with it (it's always on the pedalboard, has mute switch, DI etc) Now have the same (If not better) tuning accuracy on the palm of my hands. I actually prefer the readout on the iphone Strobosoft and having the readout displaying the accuracy to +-0.1 cent (+ = # sharp & - = b flat) is a vast improvement on the strobostomp & any other tuner I've encountered, and it re-centers itself depending on its orientation (very nice!). Obviously no problems seeing it in the dark! It is however missing some of the sweetened tunings and Buzz Feiten Tuning system settings. Perhaps it's a licensing issue or will come out in future versions. Seeing the Hz moving along with the cents would be a nice addition. I work as a guitar teacher, performer & technician (as well as being involved with & playing many different instruments) and will be using this for the vast majority of tuning jobs I have! Makes tuning a students guitar a pleasure! It's going to be great for setting the action and intonation on instruments. It'll be interesting to see how it goes on the timpani in orchestra... the noise filter may be a lot of help! Thanks Peterson for making this iphone worth the investment! As a professional, I cannot recommend this highly enough! The ONLY tuner to get for your iphone!

Great app. Having owned 3 Peterson tuners over the years I was sceptical this would work as well or even work properly for 13 bucks. It does! I have shown this to a few guitarist friends. 2 of them have bought an iPhone because of this app - love it.

Broken in iOS4. no longer working with the latest iPhone update, hoping for a fix soon... Hurry up Apple and approve the new version!!!

Amazing tuner and great value. Without a doubt, the best tuner for the iPhone. Better than most hardware tuners.

Awesome. Works really well

Spectacular!. So good I’ve intonated bridge saddles with it. Sometimes struggles to find the root amidst a other harmonics, but eventually gets it. Any chance of an Apple Watch app? There are three mics on my Ultra, please, Peterson, put them to good use!

Love it. Works perfectly. My go to when not plugged into my gig gear

Best tuner I own. The latest update has made this brilliant tuner even better!!! The problem is, I can't give it six stars! Of my two hardware tuners and numerous software ones (on iPhone and computer) this is by far the most accurate and stable and is also the fastest to use. As far as app store prices go, this is not the cheapest app around but as far as professional tuning tools go, it is an absolute bargain! If you are a musician or sound engineer, get it! You will love it!

Frustrating. Appears to be a problem with 'harmonica sweetener ' package ($20 in-app purchase). Cannot register purchase in order to get a ticket for assistance, because the product does not appear on the list from which a product needs to be selected in order to register. Very scant information about use of the app with sweetener package. I wrote twice to support but have not received any acknowledgement after a week. Maybe the tuner works ok but the $20 sweetener pack appears to be a dud

Great app. Most impressed. I've found that for best results you have dampen all the other strings apart from the one you're tuning. This cuts out sympathetic resonances and makes tuning a breeze.

iOS 7 problems. Since updating operating systems the note display is 'chopped off' so that, for example B appears as E. Needs to be fixed, I think!

Perfect. Awesome app. I own a 450, 490 Autostrobe and VSAM. They all read exactly the same. Well done guys.

Fantastic pro tuner. This is the first tuner that is perfect for every musician that owns an iPhone. I am a pro musician and this is the fastest reacting and most accurate tuner there is in the app store. I also own the full deluxe version (much more expensive) of this software for mac and found the istrobosoft reacts and measures pitch cent for cent as accuratley as it's big brother. I can not give this app high enough praise. Well done Peterson for creating the perfect portable tuner.

Best tuner under 50 bucks. Peterson make the best tuners and this is excellent. Tuned my guitar with this first and then with my Peterson Stroboflip the only difference is iPhone has a better screen and the Sroboflip sustains note longer but it is a 450 dollar tuner. Number read out for cents is good. Own a guitar get this the only other tuner you will ever use is a better Peterson

Great App. Best tuner I have used. Period. Great value for money. Thanks, Peter.

Excellent Tuner. I find the iStrobosoft to be a quick guitar tuner and easy to use.

Simple & accurate. Can't fault it. Even with the tiny mic in my ipod and iphone, it seems to work more accurately than my 'bought' tuners. Compared to them, it's brilliant value. However, compared to other ipod tuners - which also work extremely well - it's maybe a tad expensive - hence minus one star. Was pretty easy to setup the intonation on my Tele to 0.5 cent and I guess, in the end, that's what counts most. Happy camper.

Useless. Not worth the money. Better tuners for less.

Yes.. But.... I like the idea of this app.. A classic strobe tuner right on your phone..! I really want it to work for me, particularly with a pedal steel guitar.. But it jumps around a lot.. One string can quickly be represented as 3 different notes, even with filters and boosts. You get a couple of strings, a feeling of confidence, then... I have had success in a quiet room, with the phone mic and an acoustic, but things are never quiet for around here for long.. I have the Peterson cable for the phone, sometimes it picks notes up, sometimes it's lazy and no amount of jiggling the cord will bring it back...

Great investment. I can safely say I've compared this fairly with the other tuners on iPhone and it's clear Petersen still know what they're doing. I trust it enough to use it for recording and it's invaluable whenever I'm hanging around with an acoustic guitar etc. I won't even bother taking my polytune to band practices anymore, easier just to use this and an Apogee Jam. Highly recommended.

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Pro Quality Tuner. A solid app that works very well.

Great product. Best tuner i've used. Please add audiobus support so that i can make use of the iaps. Thank you.

No more accurate than other tuners and no sweetened tunings.. I have the pedal version and the iPhone version. iPhone version doesn't have sweetened tunings. That's annoying. Don't find the iPhone app to be any more accurate or easier to use than other tuning apps I have. So I don't use it even though I bought it. Do use the pedal though. Wish Peterson would stop crippling the iPhone version and match functionality with the pedal. It's not like I'm going to drag the pedal around with me all the time like I do my phone. That's the whole point, guys.

U Nuts. All packs are 38 dollars and full discount 59.99? U crazy! Two star just for that greed u have.

Just great engineering.. Accurate and very functional.

10 stars. Awesome.

Thrilled that it's back.... Yes! It's a pretty good measure of how much I've come to depend on this app, that I was biting my nails for the few days that it was out of service after the OS 4.0 upgrade. I love the always-there convenience of having a Strobostomp built into in my iPhone. Other tuners pale in comparison, both in terms of accuracy and ease of use. I do a lot of instrument setups, and I've never found any non-Peterson pedal or rack tuner that is accurate enough for setting intonation. I can hear the difference, and so can many of my friends and customers.

Great tuner. As good as their hardware tuner.

The Perfect Tuner for iOS. I love having a high quality tuner at my disposal... iStroboSoft is almost like having a real hardware unit!

Le meilleur tuner. C'est le meilleur. Je l'utilise depuis plusieurs années. Très fiable. Rapide. Très peu influencé par les autres sons ambiants. Merci aux concepteurs.

Pure awesomeness.. There is not a better tuner out there as far as speed and accuracy go. Developers: how 'bout an update that puts the capo settings on the main screen. Like up and down arrows. I find the current capo settings buried too deep. I love this feature. Thanks.

Shouldn't have to buy it twice. I Love the tuner, but why sell the iPad version separately when this version works on iPad anyway. Boo. This irritating point has nothing to do with the functionality of this great app ...5 stars.

Best of the best!. You think your guitar is on part until you verify it with this tuner... Trust me, you will sound better.

Killer app. I use this in the studio every day on bass and guitars. I don't even bother to take out my hardware tuner any more.

Sweetened tuning. Be aware that this app doesn't include sweetened tunings (I wasn't). Please, please, please! add this feature (even as a premium upgrade)... I would pay another 9.99$ just for this!

Best tuning app out there. This is fantastic and includes a great visual element that will gradually help players learn how to tune by ear. Anyone having trouble getting a “good reading,” it’s probably because you’re out of tune and not adjusting. Twist the knobs, people! And if it gets worse, twist them the other direction!

Solid. Great tuner!

Awesome Strobe Tuner. Peterson's has a great reputation for serious (professional) strobe tuners, I own two of them in my guitar rig. When I saw this app, I figured it was a gimmick, but I bought it anyway - folks, this is not a gimmick. This is the real deal, and when you consider that the price is $9.99 vs hundreds of dollars for even a stomp-box version, this is a steal, AND you get to carry it around in your pocket. I bought the connecting cable too, although it will work ok-ish without it. An amazing application, I use it all the time now. I also found a little stand for the iPhone so I can use the app without the phone flopping around (and getting scratched). If Peterson is reading this, how about a cable that allows bypass so I don't have to keep unplugging my amp cable?

Great App until... I downloaded this and it worked great, and the same day I upgraded my iphone to os4 and now the strobe function doesn't work. Although I can still tune by using the up/down arrows, it was disappointing that I was only able to use this fully for one morning. I am hoping they will come out with a fix on the next upgrade because I really did like this app.

What's with the adds?. I bought this app a while ago and bought the "pro" version. On this latest update there is pop-up advertising on start up. Every time. The app says it should only happen one time, but it happens every time. It's totally disruptive and gets in the way.

Use anything else and you are a moron. I use the strobostomp in my live rig and this is arguably as good. Amazing software. Super accurate. Every other tuning app is an imitation. You will not be dissatisfied

The best!. Best, most accurate tuner out there. Noise filter works well in loud environments. Buy the appropriate Sweetener pack when they come on sale. I’m a professional cellist and I use this app every day before I play.

I'm a fan.. Very accurate and visually appealing app. I only use it while practicing and teaching it is handy to not need a clip on tuner. Not sure if I would use as a live tuner as it is sensitive to ambient noise but never the less it's handy to have in a pinch.

Adapter cable. Buying this app with the adapter cable is recommended. I have some other 1/4" adapters that just didn't work. I am happy I can use this app late at night and not bother my sleeping family.

Doesn’t work well on anything slower than an iPhone 8. Can’t work from my iPad response time is so slow it doesn’t even lock on a note before the string fades. Somewhat better on an iPhone 7 but still has issues. Yih May think yih have an accurate note but it’s just picked a single point in time and after a second or so displayed it. Have had much better luck with another tuner

Amazing!!. The best on the market!!! Hands down!!!

Istrobosoft for iPhone 3G 3.0. This is as accurate as my genuine Peterson VS-II tuner. I think the display on the iPhone is better, because it is clearer and brighter than the one in the VS-II. The display is somewhat jumpy, even for somebody who is used to a "real" Peterson tuner. The noise filter is pretty good, and the input gain control is nice to have. I have used the Peterson 1/4" adaptor with an electric guitar, and it works fine, as well. If Peterson will be doing updates on this, I would like to suggest that they put their "sweetened" tunings in, along with the Buzz Feiten tuning offsets. They may want to look at some sort of software dampening, switchable if possible, to keep the display a little more stable. I don't know if putting in the various temperaments would be possible, but they may want to consider the temperaments as add-ons at extra charge. That way , the base software package can stay cheap, and people who actually want the added temperaments need pay for them. Kostas

Wow!. Awesome tuning in a portable size!

Best app. Best app ever

Can't get a guitar in tune. The tunings for the low e and d strings are not accurate at all on my new Rogers Iphone 3GS. I am using the most recent version of the software as well. I have compared the Istrobosoft to various other chromatic tuners and my Peterson Stroboflip (using the equal temperment settings). With the Istrobosoft the low e reads flat by 10 cents when it is in tune. The d string reads flat by 5 cents when it is in tune. UPDATE: This tuner now appears to be working correctly. Since downloading a different application, this one started working correctly. It appears to have been a problem with the initial installation. It appears like it didn't work correclty until the phone was rebooted.

This app is as good as tuners get. The end.. Perfect and precise.

Redownload. So I bought this app a while back. Then it stopped working so I went to delete it then re-download it, hoping for the problem to be fixed. This usually fixes any app problems. Normally, iTunes remembers which apps you have previously purchased, so why is iTunes attempting to charge me for an app I've already paid for?

Out of date. App is functional but has not been updated at all in many years. No longer properly fits modern phone screen sizes. An update has been promised for over a year but nothing has yet been delivered.

Not very good. Not sure why but this tuner is not very good . Peterson are the best tuners in stompbox and bench tuner form. But this app really sucks. I have a brand new iPhone and I’ve tried it with it plugged in and through the mic and it’s all over the place can’t get a solid reading with it. It also won’t even pickup my bass at all really. Complete waste of 15 bucks.

The Best!. This tuner is super accurate and stable. I do have to dampen strings not being tuned sometimes. The customer service is superb! I had some troble with input error messages and the app not working properly when I first upgraded to iOS 7. I sent an email to Peterson's customer support and they responed within a couple of hours, let me know about an udate that was in the works and then even notified me when the update was available for download. Highly recommend. Great customer support is not dead!

Not a free update. My purchased 2014 version of this app was not compatible with my 2019 ipad. I was forced to buy the current version. No gained functionality, just an additional 13.99. No response to my email regarding this situation. I love the software, but not the company.

Won't work on my iOS8 phone. Why is this app not working on my 5s? Just goes black screen, won't load.

Worth every penny. Hummed and hawed about purchasing this app as it is expensive. However it proved invaluable when setting up an arch top guitar with a floating bridge. Getting the bridge placement would have taken a lot of trial and error unless you have years of experience with this type of bridge. I got it nailed in 15 min. It is a bit twitchy to use but keep in mind this is a high resolution tuner designed to get the finest intonation from a vibrating string. Definitely a professional luthiers product. I have 2 other tuner apps which are good for getting close but with istrobesoft you get perfect pitch every time. Very impressed.

Good stuff. I've been using this tuner for a little while now. I use it for pedal steel and the pedal steel compensations are fantastic. I also tune guitar and bass with it. I use it with the pitch grabber clip on accessory, which I was having issues with before the company updated the firmware. Now it works exactly as you would expect. This tuner is next level. This is a studio quality tuner in the palm of your hand. Thanks Peterson for the email and the information on the update!

Pretty good - would be 5 stars with temperments. This is a great tuner - better than the half-dozen others I have on the iPhone. Nothing beats a strobe tuner! I have the PolyTune app but it's nowhere near accurate enough for me. I'd use this tuner exclusively except for one glaring issue: there are no tempered tunings. I know Peterson probably avoids including them because it would cause a massive drop in their pedal tuner sales, but I'd pay a premium for their sweetened tunings in this thing (hint, hint)!

Very good. this is the best $10 I've ever spent 👌🎸

The best tuner I have ever used.. My guitars have never sounded so good. It is incredible how precise this tuner is. This is the best app on my iPhone.

The only tuner program I've seen that works!. I've tried a few other tuner programs on the iPhone and most of them couldn't even tell what note I was playing on my trombone or any other instrument. Not only does this one work but it's fast and more accurate than my Korg tuner. Well work the money.

Bargain !. I paid lots of money for my three Peterson 490ST. So for $10, this is a quality iPhone app at a bargain price. For enhancement, please add stretch tuning feature and I'll be glad to pay for the option.

Accurate tuner!. Very accurate tuner (I have the adapter cable, but even the iPhone's mic is very accurate within 1 cent)! I use this for tuning my pedal steel guitar mostly. I use a custom tuning chart, so the accurate +/- cents display feature is a must. Because of the accuracy, I would bet that this is just as good as buying one of the expensive stroboflip hardware units. Thank you! PS. My only complaint is that it took a few days to release the iOS4 fix; I was without my tuner for almost a week!

Can’t beat it. Best tuner app, no contest.

Very Good. It's all true. This is a great app even without the adaptor. Worked in a loud bar tuning a five string bass with the phone in front of the amp.

love it. I paid over $300 for this technology back in the 80's!

Great precision!. This tuner is extremely precise. It also has a couple of great features, like a dynamic noise filter that will take a sample of background noises and digitally filter them out, and a volume boost to get a better audio signal for softer sounds. I actually use it on Ipad to adjust and calibrate Vintage analog synthesizer oscillators, and can actually see their extremely small pitch variations in real time! Does the job of a professional hardware tuner for a fraction of the cost (if you don't count in the price of the Ipod, or worst the Ipad).

The best tuner app ever made!!!. No hesitation, go for this app people, extremely accurate.

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Waste of time. This thing just jumps around all the notes never ever settles on a note. Probably the worst I have come across! Totally useless!!

Great Strobe Tuner...Wish it had their 'Sweetened' Tunings. I've really come to appreciate the accuracy of this tuner App...Way better than any other tuner I currently own (App-wise or even physical hardware units). And I dig the ability to customize the displays colors...Nice touch! But I would really like to see an Update that included Peterson's 'Sweetened' tunings. I've scoured through the Peterson forums and kind of get the impression that Peterson isn't entirely keen on adding the 'Sweetened' functionality to the App. I still plan on buying one of Peterson's clip-on strobe tuners, but having a back-up via my iPhone would be a really good thing. Hopefully the 'Sweetened' tunings for the iPhone App will stay on their radar for future updates. Great product otherwise!

Not as advertised. Expect to pay $20 for guitar and steel tunings alone. Over $100 in-app purchases for total access. Insane rip-off.

Great buy!. Ten bucks for a great tuner!

Best App Ever, But.... Peterson Istrobosoft tuner app for the iPhone is a very powerful tool. I believe it is even the best tuner app on the market but there are several things that I think it is missing that every musician can agree would make it much better. This app deserves a pure 5 star rating, but it is missing a pitch pipe function and a metronome. Some might say, "this is just a tuner not an all in one" and I can see that in account for the metronome but I think any tuner app needs to be able to give the pitch as well as correct your instruments pitch. I do a lot of vocal work and I don't have perfect pitch, I have relative pitch, and I, and probably many others, would benefit greatly from this app if it has the ability to give the EXACT pitch. This app corrects pitch with incredible accuracy, I think it should be able to give pitch with the same accuracy. I will change my review if I see future changes addressing this.

Gunsmith,Graphic Artist, Many Arts. If you never own any "Fine" or Best Made product, you're wasting your life. You obviously have one already. The iPhone. You will simply NEVER EVER regret obtaining anything carrying the title of Best or Finest made. Ask the owner of any of the finest built guns, cars, boats, musical instruments, or anything else and they know. It's not a waste of money, it's essential. The lesser products are there, unfortunately, but remember, you won't regret having the best. Oh, did I mention that this is the only tuner? You don't have a choice here, so if you want to know whether you should get this app all I can say is you'll smile every time you use the best ANYTHING!! now you want to be happy don't you?

Apple Watch compatibility. This app functions perfectly for me. One thing that would add to its awesomeness would be to add apple watch capability. Just a thought.

Drop capo function gets activated accidentally and mysteriously. I have had many Peterson hardware and software tuners and in general I like them. The "drop capo" function however is absolutely maddening and should be locked out or lockable to "never use this ever". I never need it, never want it, never activated it or any other calibration except normal A440. Nevertheless, about 1/10th of the time when I go to tune an instrument I will discover to my extreme displeasure that I am not tuning to the note shown on the screen but to a LIE based upon the spontaneously-altered drop tuning setting which I absolutely hate and never want and I have no idea how it ever gets activated. The inconvenience of this feature is so great that I am looking for another tuner app.

Better than Strobotuner???. Yes it is😎

Love this APP!. I thought nothing would ever replace my old trusty BOSS TU-12H Tuners, I like iStroboSoft better! It's so convenient and it works really well!

Overpriced piece of crap. Don’t buy. $10 out of the gate, and all of the sweetened tunings are an additional in-app up charge. And just to pour salt in the wound, the tuner does not detect pitch well. Huge waste of money.

App stopped working. I like the app but I don’t use it very often. Today (4/7/21) it stopped working. No response from the tuner. Deleted and re-downloaded but still get no response.

Terrific Tuner. I have used tuners of all types since the '70s, and I have been using my Autostrobe 490 and VS 1 to tune 47 strings (also known as a harp) for work on a daily basis. The iStroboSoft has exceeded my expectations. It's easier to read and ridiculously portable! Thanks, Peterson. It's true that the iStroboSoft picks up the upper partials on the bass notes better than the fundamentals, but upper octaves (6 and 7) read beautifully. My fellow (professional) orchestra members ooh and ah when they see me using it, and quite a few want to purchase the app for themselves. That said, when there is a lot of ambient sound around, I still have to resort to using my big and heavy Autostrobe 490.

iOS 11-only?!. Latest version requires iOS 11-only?! At least I didn't waste any money on in App purchases...

Kind of wish I hadn't updated.... >>INFO ABOUT NOISE FILTER/INPUT BOOST You have to scroll down at the left main menu (tuning/strobe/display) because they are hidden at the bottom, oddly. Sometimes low notes on my 5 string bass are read as the 5th/overtone and not the fundamental (had no problems before the update). The removal of the noise filter/input boost/large tuner display and drag-to-adjust capo and reference frequency irked me a lot since I tune on stage sometimes and need the clear display and option to tune to 432/etc (without having to go within the settings menu) as well as when I tune quieter instruments. Also was bummed a bit when I saw that display color presets were missing (esp. the default, because once I changed the colors and wanted to go back, I couldn't). The sweetened tunings and everything are cool add-ons, but I really don't see why all the other things had to be removed as they were not ever in the way/problematic. hmm...

Simply the best. If you need a tuner You won’t be sorry

Most acurate tuner on iOS. But AUv3 please!. I love this tuner, but could you please update the app and make it a AUv3 plugin as well?

Update for the HD version?. Are you planning an update for the HD version?

Best tuner for the $$$:. Put my snarks in the drawer after using this tuner. Just like my Peterson VSS-C but a fraction of the price.

Tuner Works Great!. This tuner works great, really. It does everything that I want it to do. I'm a professional musician / music teacher. I teach full time and perform weekly. I use this tuner everyday on guitar, bass, and ukulele. I also check my intonation with it. It is extremely accurate. For those people that write about trying to tune an instrument and it gives them a wrong note on the tuner... if you're using a stringed instrument, somtimes the tuner will pick up the harmonic instead of the fundamental of the note because the harmonic is very loud. If you use the 1st harmonic to tune with or move more toward the center of the string, when you pluck it or bow, then the fundamental with be louder and you won't have that problem. This app is flawless, and has never crashed on me. I use an iPhone 4.

Well worth it!. I am a private studio violin and viola teacher, and I use a Peterson to tune my students just so they are really in tune - and love it. It is too big to drag to my own orchestra rehearsals though. When I saw this application, I wasn't sure if this would work well for upper strings - but I decided to give it a shot, and boy am I glad I did! It is almost easier than my studio tuner, and seems to be as good (at least on the first day of use). Now I can have the same quality tuner when I travel - and I can recommend an affordable strobe tuner for my students with iPod or iPhones so they too can use it for home tuning. Thank you!

a steal at $9.99. I have a couple of normal tuners in my collection of stuff but Peterson Tuners are on another planet or accuracy by comparison. The fact that I can have Peterson accuracy in my iPhone truly is exciting and worth every penny they ask. This application a steal at $9.99! I used the mic on my iPhone to intonnate my very hard to set up 5 string bass and it was a breeze (yes it can even hear the low B string open or harmonic). While a direct input would be nice for more than this tuner do not let it detour you it works very very well in a controlled noise invironment. I will continue to you my pedal tuner at gigs but now I have a true set up tool available to me and for a song of a price.

What a great deal.. What Can I say that others haven't? Not a whole lot. This thing is one great tuner. I expected it to be good coming from Peterson but this has exceeded my expectations. The display on the iphone makes this thing look even better than their stand-alone units that cost 20 times as much. I have the 1/4" jack on order from Peterson's site but it works quite well with the mic. They even have a mic for the ipod touch that you can buy. I would have to say that every guitar tech should have this program. The only thing I would like to see added is sweetened tunings (I.E. Buzz Feiten etc) but I rarely use those anyway. Go ahead and download it now.

❤️it!. string player. love it. love it. love it!

Umm there is a problem. When I first purchased this app, it worked really great, but lately (last few months) it now skips or jumps, extremely frustrating!

Accurate & A Great Visual. We use the desktop version at my work for instrument sampling sessions, so I knew this would be a decent app. I wasn't sure how great the iPhone mic would hold up, but figured 10$ wasn't a huge hit. I'm surprised that the accuracy is still pretty spot on, I believe it's something like a 0.1 cent. I like the full screen mode, getting the full use of that iPhone 2-finger zoom tool :D and it's a great visual for little vocal stuff I do in my bedroom, although it doesn't help me sound any better haha! This strobe tuner is great!!

Amazing!. Amazing!!

Works!. I was very skeptical. I've read about strobe tuners and how they work, and it didn't seem like this could do anything like a strobe tuner in a sensible way. However, I use my iPhone as a tuner a lot, and I thought I would give this one a try even though it is so expensive, mainly because of the positive reviews. It works great! It snaps on to the note lightning fast and shows very repeatable results. I found that I could do more with it than I could with other tuners. I used it to tune my tom drums, and it is fast enough and accurate enough that I could see the effects of tiny adjustments on the drum lugs and I could get the fundamental note of each tom right on pitch to a nice set of intervals. My other tuners don't work with tom drums because the fundamental bends in pitch quickly and the overtones are irregular, but this tuner is fast enough and tracks accurately enough to do it. Neat tool!

WANT MY MONEY BACK. COMPLAINT ABOUT PETERSON iStrobosoft TUNER APP: This tuning app is worthless. I wanted to use sweetened tunings for my acoustic standard guitar and my dobro. Since it was impossible to find out how much the sweetened tunings cost without first buying the app, I went ahead and bought it. Then it was $6 more for the sweetened tunings, so I went ahead and bought it. I use open D tuning. I cannot find an option for open D tuning in this app. Also the scrolling thing never stops. The free Fender tuning app I was already using is much better. Please return my $16.

Worth every cent (pun intended). Excellent value for price.

Best small tuner I've used. Those saying it isn't accurate don't know what they are talking about. I have compared its tuning to a full sized, several hundred dollar Peterson tuner and it is practically identical. I am a professional orchestral bass player and if it can accurately tune an upright bass, it can tune anything! The microphone on the iPhone is not spectacular, but this tuner is! Every instrument in the orchestra I have had try this has been very impressed. It is the best small tuner I've ever used. If you already have an iPhone, the value is simply unbeatable!!!

Being in tune is worth way more than $10.. It is a steal, even at $10. This app is a successful implementation of Peterson's virtual strobe proprietary technology. The application compares very favorably with my original 490 and my StroboStomp 2. I am a professional musician and stringed instrument tech, and even though I can tune to within 5 cents by ear, this is an invaluable tool to constantly have in my pocket. To the reviewer that defiled the ratings out of ignorance because it's "IOS 11 only" - if you have a legacy device, as I do, the workaround is to buy the application through iTunes on a computer, then "get" from the App Store on your device. To the others who removed a star because it doesn't have a pitch pipe or metronome - where in the description does it claim these features? This is a tuner, and a damned good one. A used replacement for my StroboStomp would be $70. Many naysayers here probably have a $100+ Boss TU-2 on their pedal board (it is crap, has no pitch pipe or metronome, and employs LEDs to get guitarists vaguely close, yet nobody's whining to Roland) Sorry to bristle at ignorant reviewers, but they detract from the quality of this tool. Get it, and tune up already!

Good. The icon for the app is black and white but i cant make the tuner black and white. I thin im just being nitpicky though

The best. This is one of the best tuners you will find anywhere. Very accurate and easy to use.

Perfection. Referred by a friend and have to say, one of the best timers I have tried. Highly recommended! Worth every penny. Just wish they had a sweetener for the upright bass

Simply the best!. Best mobile tuner, best accuracy. Essential for any instrumentalist!

IStroboSoft. I don’t know what happened this app, but it won’t open for me and I just used it yesterday. It was the best of us kind when it opened.

Worth much more!. I got this app after it was reviewed on the Tape Op website. It's a really amazing app and easily replaces any non-pedal tuner. It works perfectly fine without plugging in, and even better plugging in. I use an iRig with it, as opposed to Peterson's cable, and it works fine, just open the app, the plug in the iRig. I find this easier to use and more accurate than my Boss tuner pedal. I'm only keeping that for live use. I mostly do recording, and this is the tuner I'll be using now. Beautifully made app, highly recommended!

Handy. Works very well!

Incredible. This tuner is mad serious. My brother got this app before I did and tested it side-by-side with a mechanical Peterson Stroboscopic tuner at a music store, and the accuracy was unbelievable. Other tuners sold through the app store are accurate within a couple cents, but if you want tenth-of-a-cent accuracy, don't look any further. One minor problem: if you are in a noisy environment, the low E string on a guitar may register as a B. This has happened to me a few times before, but it hasn't happened when I use the noise filter button.

Not for pedal steel guitar. Expensive add ons are needed. I purchased this app and deleted it five minutes later. A waste of $10.

Fantastic! Well worth the price.. I bought this app a long time ago and decided I didn't like it. I used Cleartune instead (which is itself excellent). But I gave iStrobosoft another chance and it's now my favorite tuner. I use it to tune my guitars. What makes it special is the colored bands. It's so easy to look at it and tune each string until the bands stop moving. When there is little or no movement in the smallest band, your string is spot on. Cleartune is nice for knowing where you're at when the string is far out of tune. It's "wheel" display makes that easy. But for fine tuning, iStrobosoft is the best.

Best tuner in the app store. After using the "cleartune chromatic tuner" for a few months this is a much welcomed addition to my iPhone. The user interface is flawless and it has been both recognizing and tuning my guitars with ease. Especially with the added options of plugging in instruments and the ability to calibrate it makes the $10 price tag easy to shell out, not to mention all the same options as the high priced apps. this is by far the best tuner in the app store. Keep the updates coming!

Great but drains battery fast. Great tuner app - I depend on this as a pro musician. Wish I didn’t have to force-quit after using, but it drains my iPhone 6S battery FAST if I don’t.

Useless. Worst tuner ever. Don’t waste your money.

Great with timpani. I use this app with much success when clearing timpani. When the device is near the center of the head the app will show the main pitch, what ever it is even if not centered on a standard western note. It it is still or a steady scroll, you are good. But if its bouncing around, you know that some of the lugs are out or tune. Then when putting the device near the tension rods, the strobe will scroll up or down at first when the head is struck, if that particular lug is higher or lower than the resonate frequency. Then it will settle to the center pitch. The direction and speed of the initial hit shows if that tension rod is higher or lower than the resonate tone and by how much determined by the speed change. The strobe is very forgiving and doesn't show just a bunch of flickering bars. It is smooth when tuning any instrument and very easy to read. I've never been able to clear timpani heads so fast. And it seems to work fine on mi iPhone 5.

I love it!. I use this app and my Apogee Jam to intonate all of my guitars. Works flawlessly most accurate tuning app that I know of for the iPhone.

The Highest Grade Profesional Tuner!! Without doubt.. 1) I try every quality music app that comes along. 2) I have been tuning pianos, reed organs, EVERY kind of stringed instrument... for nearly 60 years. 3) If I say it’s good, I have the critical experience to judge it, and prove it to myself. 4) If You are a pro, or highly experienced, throw out the apps that ‘try’, and get THE one that DOES.

Often show incorrect note. When it works it works. But it often doesn’t hurt irk. Very picky about input shank and often displays the wrong note.

Great tuner but should be universal for iPad.. First off, this is a great tuner. I have several tuners on my phone and iPad and this one is the only one that I would consider using to set the intonation on my guitar. It is a one trick pony but it does it well. I do have to subtract a point for overall value though. With the price premium we are paying for this app there is no reason why this app can't be universal for the iPad/iPhone. Better graphics for my iPad costs me another $10?! I think I'll just run the iPhone version on my iPad and pocket the difference. It's a tuner not a video game, why someone would buy this twice is beyond me. I'm a teacher and I frequently have students ask me about what to buy and honestly I steer them elsewhere. For the same money my students can get a metronome, tuner, chord and scale finder, etc... with an app like Guitar Toolkit. Yes, the Peterson tuner is more accurate but +/- 1 cent is more than adequate for a casual player. If you're a pro buy the Peterson, if you're just getting started check out the other offerings.