RacquetTune - String Tension App Reviews

Great Update. I have compared it to a friends ERT300 Tennis-computer (which costs $199) and the results are very similar. One of the best apps I have on my iPhone. To NickLurby: Try and use something else to tap with. I am using a spoon(!) After finding the right tool I am getting very consistent results

Measure works, seeing data not. I've been using it for a few months and it has helped me to play more often with the tension range I like, therefore help me improve my game. I couple issues are bugging me though: 1- in History the Curve view never works 2- in History it displays the tension in kg only 3- it should have a way to log how many hours were played since last measure

Dont buy a tennis tension meter!. This app is so much better than the $30 string tension tools on tennis websites. It not only gives accurate readings, but stores the results so you can see how strings act over time. Great job guys! I sent a question to them about string bed stiffness, and they responded within a day. Love it!

A must for the serious player. This is a great app. The tension readings are usually spot or at least very plausible. But more importantly, they are consistent. If you test a racquet several times you will get similar results every time. This makes it useful for monitoring tension loss and comparing rackets. The swingweight part is also a nice addition. For 99 cents it's a no-brainer. Some complain that it shows a lower value than the settings on the string machine. But that is not a problem with the app since the actual tension in the stringbed usually is 5-10 lb lower after stringing.

Works well not perfect but good enough. I believe the string tension is accurate to a certain degree. This degree is good enough for most stringing applications and you usually get within a few pounds of what is accurate especially useful if you have multiple rackets, you string together and you want to know where the tensions are on each of them relatively

Great app for avid stringers. I find this app extremely useful. Right off the bat, from my experience, it seems very accurate. I always use this app right after stringing a racquet to test the reliability, and unless my stringer and this app are off by the same amount (usual a +/- 0.5lbs between the app and stringer), it's dead on. From there, I find it very interesting to track the tension decay over time (from playing and not playing with it). Helps me determine what types of string retain tension best. All in all, love this app, use it almost everyday. Can't think of any improvements I want to see

Great app. This app does a great job of giving me a baseline when I string racquets. I check the racquet every so often see how the tension holds. Helps determine best tension for playability and helps me choose string. It's fairly accurate with its calibration but primarily a super useful tool for the average player to determine the best tension for your stick.

Great app for those who string their own racquets.. We have a basic tennis stringing machine at home and this app fits our needs perfectly. I can easily check my string tension anytime and it lets me know when it's time for a string job. The app is well supported with updates and always runs smoothly.

Keep getting the error messages. I recently purchased Racquettune after reading positive reviews, but unfortunately, I haven’t been able to use it yet. I keep getting an error message saying, ‘You must pick a racquet and a string,’ without further guidance on how to resolve it.

Doesn't work with hybrid strings. I'm using hybrid strings (VS Touch and RPM or Solinco Tourbite) with different tentions for mains and crosses and couldn't get a consistent display. Spend quite some time to try to get the string factor setup right with no luck.

Measures about 7lbs off for my 3 racquets. Strung all 3 of my DR98 to 55lbs with Solinco Tour Bite 16g. Checked tension right after stringing and gave me readings of 48lbs on all 3. Tried to mess around with the string factor, but it still gave me readings between 45-49lb mark. I’m still going to keep the app to use as tension reference points after matches.

Works great!. I first read about this over on the Tennis Warehouse forums. Several people mentioned they tried it and it seemed accurate. I decided to give it a whirl myself, and Yes, this app seems to be great! I've been stringing my own racquets for many years, so I have a good understanding of string tension. This app was within 3 lbs of what I strung my racquet at, which is appropriate given tension loss right after stringing. This app is easy to use and will be quite handy to monitor when strings start to go dead. Great app and I hope to see future versions. For the future, tracking/recording options of the data would be nice and perhaps add in specific racquet and string data. But again - WONDERFUL app.

This app is great!. The app is easy to use, has plenty of instructions. I use it to track tension for myself and a few friends that I string for. The accuracy can't be beat, and it's nice to use each time I string to check for consistency. I recommend this app to any tennis player looking for greater insight into their racquet's performance.

Excellent App!!. This app is excellent. I use it for own racquets & for my stringing customers! It measures tension accurately & consistently!! Any reviews saying it doesn't work simply did not take the time to learn it & use it properly. It is a must have for players & stringers!!!

Clunky, no longer works. I used to love this app. The UX isn't intuitive but that was ok. But I can no longer get the tension analyzer to work, making this app useless for me

Better than I expected. I have had this App for a week now and the results have been much better than expected! I use it to find out how much tension drops after each playing session.

Not reliable. It doesn’t give you consistent tension. It gives me different tension every time. Total garbage.

Great app when used properly. Terrific app that works as advertised. However, for the most precise reading, it has to be used in a quiet setting where there is little to no ambient noise. If it can hear the neighbor's lawnmower, the plane going overhead, the birds chirping, or your friends yapping about how it's not gonna work, the analysis will get contaminated, and you'll get a less than accurate outcome. A word to the wise....

Bogus. Save your money. Doesn’t work plain and simple. I knew better. Just a toy.

Essential. I have 3 kids who play competitive tennis and so stringing has become essential. I find the app to be incredibly accurate, allowing me to get predictable tension every time. I could calibrate the tension on my stringer with the reported tension on the app but that's not necessary since the readings are so consistent. I now have something like 10 different racquets and at least that many strings in the database . It's easy to add more. It's great for checking tension after a couple of uses as well as for actual stringing. Very impressed. I've strung over 100 times using it and I'm very satisfied.

Great app for keeping track of tension loss!. If you wait till your strings break to restring your racquet, you are waiting too long! Strings lose their ability to transfer energy to the ball and create the spin needed for accurate powerful shots. This app helps me keep track of my players string tension loss and replace the strings before they lose playability. I highly recommend this app!

Awesome lead tape balancing program. For those of us who want to customize our rackets, this program is amazing! To be honest, i havent tried the string part yet but i am using this from now on to balance / write my custom specs.

I must be doing it wrong. I restrung my racquet at 55#. This app said the tension was 40.2# right after I finished. I checked the string factor and ensured that I’d entered the correct values all the parameters (e.g. string pattern, racquet face size). I followed the measurement procedure to the letter. I could believe a couple lb. change but 15? Nyet. The racquet plays like 50-55. A Gamma String Tension Tester said the two center main strings were at 55# and the two center cross strings were at 39 and 40#. Why are other users getting numbers close to the tension at which they strung? Not even close for this app. Sorry

Wow. I am totally amazed at what you can now do on your mobile phone. Never did I think about something like this. Glad I saw something posted. I am an avid squash player and this did help me to keep my rackets just the way I like.

Ahead of the game. Great product! For what I paid ($1.99 I think) about a year ago was happy with the product. Since then, the app has been updated to make it much more valuable. I string my racquet and test it with racquetune and it reads consistent time after time. Only small complaint I have is you need a fairly quiet area to use it preferably indoors.

Best app for serious tennis players. Read about this on the tenniswarehouse fourms (Oddyssey MK4) thought it was worth a 99cent shot based on what I read. I must say this app is very useful and from testing old strings and fresh from my machine it's very accurate a must buy!!

Great Technology. Without a doubt the closest thing to an industry standard in measuring relative string tension. Incredibly accurate. Should be in every serious player's toolkit. There is no competition when it comes to this App.

Not too bad.. Only reviewing for badminton equipment. When you save a string pattern it won't show up correctly in the description. You also have to dig into the menu every time the program starts to select the low tension setting. Missing some string pattern combinations as well. Would be nice to be able to enter the number instead of picking it (both for pattern and area). Still trying to get accurate string values but seems to be ok for the most part.

Very clever - and good. Great way to track the loss of tension of your string job. 1st version it was sometimes tough to hit the and get a reading; with the current version it almost always gives a good reading.

Amazingly Accurate. It’s almost too good to be true. I get readings and I think, no, it must be wrong. It can’t be a mistake a made. Sure enough, I did something wrong. When I string exactly the same, I get the exact same output. This is an amazing app. It has helped me string better and learn more about how my string tension changes over time. Well done!!

Great tool. If you like to customize your racquets, this app is the best! There are all kinds of tools and info to help you out. Highly recommend you download and try this tool. You will not be disappointed.

It is what it is.. I got it yesterday, and tried it on several racquets I had to string. It does a passable job. My problem with this type of thing is it measures tension, in lbs. or kgs. As such, there will always be discrepancies of a number of units. What you are looking for when you measure a string job is consistency, or the drop in measurement from when it was first strung. Such metrics are better stated in units that have no particular relationship to units of measurement. Since there are literally hundreds of strings on the market, it is possible, even probable that there is no linear information for the string you are using. Granted, you can get close with the information available, there will be variations, however slight, which will give a somewhat false reading. The best way to use this app is get a measurement, regardless of variables and use that number to determine consistency between racquets strung at the same time or between string jobs on the same frame. You can then check unit change over time and how much playing. One more thing; there will be differences of measurement between frames that are supposed to be exactly the same. This can be due to stiffness in the head, etc. so one can never be sure the measurements will be exactly the same, regardless of who strings the racquet. Vince Chiarelli, MRT, PTR Owner String Along With Vince Largo, Florida

Very useful. Been using this for 5 weeks on two racquets with incredible results. A great tool which has already convinced me to switch to a new string that has the same playability but more durability. No more guessing when it’s time to restring. And that’s a big deal!

String factor accuracy is crucial. Fantastic app. Incredibly useful to graph how the racket loses tension over time. Readings are very accurate. (note, if I’m stringing a poly, I can sometimes lose up to 10% by the time it’s off the stringer, then maybe another 10% over the next 48 hours) String factor accuracy is crucial, and the online database can be hit or miss, you’ll see lots of variation in there. You should measure this yourself to make sure it’s accurate, because it will greatly affect the reading. I use the weight method, and that’s worked out well for me so far.

Excellent Product. Excellent tool for monitoring tension loss and documenting results! All 3.5 level players and above should use this tool to monitor tension loss and restring when loss approaches 16-20%. At this point, I notice balls beginning to sail just long - on swings I feel should have stayed in.

racquetTune string tension app. This is very useful and effective app for racquet stringers and racquet sports participants as well. It is a useful tool to determine, in relative terms, how much your racquet tension has changed over time, and when it's time for a new string job. It is rather accurate and consistent, especially when you consider all the variables and limitations of measuring string tension accurately. I also appreciate that the developer was very responsive with effective and personal feedback with an issue I was having (user error). Also, the "history" feature has replaced my old paper stringing log book. For professional stringers, this app could become an effective marketing tool.

It works for me. To get it right, get a new string on your racquet and play with the value of the string factor until match the value tension of you new strings.. it works for me 👍

Doesn’t work. Tried it on the same racket 3 times within 10 mins and got 3 different results from 30 lbs up to 60 lbs

Not accurate. Don’t waste your money

Great app!. Not only good for reading string tension, but also great for previewing and tinkering with weight customization ideas. Much quicker and easier to use than other online customization calculators I've tried.

Great to understand tension. Great to understand how tension declines, not accurate but precise!. Keep notes on how it played and use the tension reported by the app as a reference. I use RPM Blast 17, pre-stretched 15 sec, strung at 55:53 and app reports 45.4, still very useful since these measurements are very consistent. I use this app now to keep a log of my string usage and tension. I recommend it!

Stopped picking sound after iOS 26.4 update. Hey Sten, would you please update the app? The app was still picking up my tapping before the 26.4 update. It's completely dead now.

Fantastic App. I am a home stringer and was reluctant to buy one of the real devices due to their high cost. This app was the perfect solution! Tension reads what I would expect and stays consistent every time I retest it on the same racquet. Overall very high quality app

This app works well!!. A great app to monitor string tension. It works flawlessly. I am a 5.0 player and I highly recommend this app to anyone who is serious about their racquet maintenance. Buy it!!!!! Revisited: New update 2.5 is amazing. Buy this app and monitor your gear. Another amazing update ver 3.0. Racquet database is a much welcome addition. Simply awesome!!!

The phone stopped measuring tension. No Support option to ask questions.. The phone stopped measuring tension. No Support option to ask questions. There is discrepancy to the stringer and other stringing testing apps. Tends to measure below actual by 1-2 kg.

Not consistent or accurate. 90% of the time I could no get the app to pick up a tension despite following the guides Racket strung at 47lbs confirmed on ERT tension tester machine. When I got racket tunes to pick up, it showed 58lbs. Used the correct string set up. At best this app might be able to tell you which of your rackets is strung a bit tighter. But that’s all. Just a gimmick. Wouldn’t waste your money

Pretty inconsistent. I place the phone on a table, lay the racquet about an inch above it and use a wooden spatula to hit the strings. It has a delta of +/- 4-5 lbs and is hard for me to trust.

Everything you need. Perfect for customizing rackets

Works great for me. Great little app. I have three racquets that I have strung the same (50lb) on a digital machine with full bed poly every two to three months. I check the tension with the app every three to four weeks and can see the steady decrease to about 40 lb at which point I restring. I play with confidence that nothing wacky has happened to the tension.

Great app for tennis players. Being an engineer and tennis player I find this racket useful in helping me track string tensions. Since I'm not a pro I'm responsible for having my three rackets strung. I use this program each Saturday morning to see if any of the rackets have become more loose than the others so I can play that racket less until it catches up with the others. I'm now stringing one with different strings and using this program to evaluate how well the new string is holding tension vs. the other two rackets.

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Excellent!. I am a professional stringer and I love racquetTune. Very easy to use, always with me, the results are spot on. Definitely worth it.

Very useful. Great for testing string tension over time and playing with swingweight Brough customisation. Works well. Accuracy is the most important thing here. Kudos.

Great concept but unreliable for me. Great idea but I kept getting different results- too inconsistent to rely on.

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Racket time. Nice app, keep up the good work

Wow!. I was always wondering about real time tension info on my strings since i wanted to know what tension was my racquet at just when I was getting the best feel from it. Now i can do it and let my stringer know exactly what I want and check his work too:)

Works well. Good for tracking tension drop

Great app. I only use for tension. Not sure about the accuracy but it's a nice gauge for tension loss.

Nice app. I like this app. I only use it for tension. I'm don't think it is super accurate but it is consistent which is not important for me.

Very helpful. People who play a lot need consistency, and this app keeps the stringer in check, if you are not hitting well, you can now eliminate string tension issues, the actual accuracy of poundage doesn't matter (although very accurate actually) what one really needs and gets is a reference point and a way to monitor string tension drop over x hours of play , it's great!

Worked ONE TIME (maybe?). Gave me a number like 27lbs in a racquet that had been strung at 58lbs and played about 50 hours. Then never again another reading using the exact same thing to tap with. Do not get ripped off! Save your $4 and buy a coffee instead.

4lbs off. Never accurate

Not accurate at all. Waste of money, newly strung racquet at 53lb, app only give 40lb, tested a few more, none of them even close. Don’t buy!

Okay, but waste of time. The app has a few good options, but I just need a tool to give me the right tension. Just strung 2 racquets at 52lbs , followed the instructions closely and tried it out. It gave me 42, 41, 43... then I tried with the other racquet: 44,45, 44lbs. Pretty far off and the little circle takes forever to go full. Tried different configurations and played in the settings as well.. For me it's a waste of money and time to use this app. Uninstalled from my iPhone.

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Great Tennis Science. This app feeds my curiosity. It answers "how consistent am I (or my pro shop) at stringing my racquet?", "How close are my two racquets right now?", "Does ATW lose tension faster than Two Piece?", ...

Very close to accurate!. Very well done app. So far detects everything I've thrown at it.

Great long term. This is a great tool to follow relative tension and how it decays after the original straining. It's also helpful to know where you play your best with a specific rqt. I'd pay for it!

tennis guy. I think RacquetTune is a terrific app! Very easy to use and quite accurate!

Doesn't Work. Simple -- this doesn't work. Reading wasn't even close to accurate.

It works. It works, I use it after each string job and to check tension loss. Navigating through the menus of this app could be improved.

RacquetTune. Reliable and useful app. A must for serious players.

Awesome app!. This is an awesome app for tennis junkies, especially ocd players who are obsessed with string tension. Amazingly accurate!

Great Tool for Sringers. This a neat tool and seems to work. I used it after stringing several racquets and then again right after playing and got acceptable results. Very cool.

Perfect for recreational players. Awesome app. Great instructions on how to use its functions and the information it provides is easy to read.

Great way to compare tensions. Useful for measuring tension loss and comparing tensions between rackets.

Sorry can get it to work! Tried different raquets and objects. Save your money. Doesn't work

Great tool. Always improving the app. Great tool to monitor the string tension and keep a record of changes

The USRSA is not going to like this.. Works well, and good to have. The best thing I found to use with it is a small wrench. I think I'm getting the hang of it.

Not for Racquetball. This app is based on measurement of the frequency of vibrating strings and requires that there be no dampers on the strings during measurements. Unfortunately, racquetball racquets nowadays tend to have integral or non-removable damping elements, so this type of app will not work.

Racquet Tune. So far so good. Sometimes it seems that it is not picking up the sound very well but am experimenting with different tools to strike the string.

Great app!. Easy to use and helps me keep records of my customers.

Great. Great app..great job..I'm being forced to write this"................

Effective. Seems to work well, especially as a tool to measure relative tensions between rackets and tension loss as a function of time.

racquetTune 3.4. Great app for tracking racquet and stringing information. New version with interface makes it easier to input hybrid string combinations.

Great app. Perfect for measuring tension loss only if you don't want to calculate custom string factors.

Great app!. Perfect for tracking changes in tension. Very accurate for me

Accurate within 15 pounds. If you don't need precision, this is the tool for you. My racquet registered between 53 and 68 pounds consistently. I think this needs to be tweaked a bit.

Doesn't work at all. Does not work at all with my racquetball racquets. Very disappointed, what a waste of money.

Teaching pro. Very useful in tracking relative tension loss over time or comparing tension in multiple rackets. Helpful in showing members when it's time to restring.

Not working. Tension function NOT working...tries rebooting the phone and still not working

Hmm. I can't seem to make the whole racquet tuning thing to work properly. The tension deal was 10lbs off also.

Good App. Very good app.. works great. The functionality works as advertised.

Valuable tool. Great app for monitoring string tension.

Good, but not always responsive.. I use this all the time, and really like it, but I sometimes have a very hard time getting it to read the frequency.

Great app. Thanks for creating this app. It makes things a lot easier and creates confidence when stringing rackets.

Helpful. A useful tool. Recently just started stringing so its even more valuable.

Not a great tool for badminton. Not a very great tool for badminton not very accurate... Also test on test all over the place wish haven't purchase

Great Tool. Use all the time to track tension and also use the Swingweight to assist in adding lead weight tape.

Not for racquetball :-(. Bought the app for my racquetball racquets several months back and disappointed the app doesn't support the sport. Let's have an update already.

Review. I think it works well. Checked against a babolat stringer, was accurate.

Great tool! Great price!. I string and play tennis and I use this app quite a bit. It gives you a great basis for tension off the string and for tension loss over time.

Must have for string nerds. Checking and tracking the tension of my racket was the original reason for getting Racket Tune. Now, when investigating different strings and tensions I use it all the time.

Just great. Very helpful, easy to use app. Good job.

Tension. Very accurate. Use it daily to monitor string tension

Goooooood!. Great app! It's good to me. However, I hope to measure a hybrid string tension well.

Very Cool!. Best method I've found for measuring string tension. Excellent!

Not bad. Pretty good and accurate. Helps a lot!

Well worth the money if you're serious about tension. Indispensable if you're serious about racquet tension. Works outstandingly well – as long as you're in a quiet room/setting.

Fantastic. Great for tracking tension.

Great app - useful tool. Really useful app. I string my own racquets, and use this application on a weekly basis to check which racquets needs stringing next.

Great app. Very nice app. I am a self stringer and wanted to test what tension I strung it at. This application is correct up to the .1 decimal place everytime I tested it on my rackets. I am amazed at how well this application works.

Does not function well. This app says one of my racquet is 23 psi. It also says another racquet is 54 when I know it is 60 psi. All of the shock absorbers are off of the racquets. Mind you this is after plucking the string 99 times.

4.1 Version solved previous problem. Developer Sten Kaiser worked very diligently to solve my problem with version 4.0. Once again a fantastic app that I use on a near daly basis

Great app. Works very well. Great for tracking tension loss.