HP 12C Platinum Calculator App Reviews

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Smooth, Bug-free, Fast. I’m a huge fan of these calculators and bought this one so that I’d have access to it anywhere. So far it’s been perfect. No issues whatsoever. Works great, looks great, and it starts up extremely fast. I also love that the mobile version has the portrait mode and the “tip” functions.

Hp12c. I use this app almost daily. The PMT function doesn’t work anymore, returning an error message. I’ve been using one for a decade, so it’s not user error. Likewise now my CLX clear button closes out of the app. Can’t believe I paid for these bugs and no version upgrade in sight. Get on it HP!

Seriously? I have to buy the app again to get a 64bit app? What an absolute ripoff! Boo HP. I’m shocked at the absolute egregious behavior of HP. They don’t update the app - then offer a new version that is updated that requires new purchase. This app is the most expensive app I’ve ever purchased. I’m sure not going to buy it again

HP12C Platinum app not working with iPhone or iPad now. After updating my iPhone and iPad to iOS 14 the app does not work for basic payment calculations and the app closes randomly. I’ve owned both the 12C and the 12C Platinum physical calculators in the past and I am now forced to use someone else’s app. HP please update your app!

Unusable. This app worked fine when in bought it, but lately It ALWAYS crashes before I finish a calculation. I need this calculator for my job and keep my actual calculator at my desk. I paid for this app to always have with me in the field and has been unusable lately. If this doesn’t get remedied soon I will ask for a refund.

Really HP?!. This app was supposedly created by HP. I would love to use my phone and/or iPad with the 12C app rather than have to carry around a separate calculator. Whenever I open the app, it immediately crashes. Then again, then again. Usually after the second or third launch, the app will actually work. It’s incredibly frustrating and it makes the user look incompetent in front of a client. The 12C is a professional tool and it needs to function properly.

Excellent. Six years ago I wrote a review and gave it one star because of some math inconsistencies that were also at odds with the way the real 12CP worked (I still have two of them). I had honestly forgotten about this review. I revisited the app and now give it 5 stars. It seems to now work like the hardware version in everything I checked. This is as good as it gets.

Works great with iOS 11 (October 2017). As of October 21, 2017 this app works great in iOS 11. Given that HP is now using a cheap low cost provider to make the new physical calculators out of Asia, this app is the only HP12c worth buying. The new physical calculators don’t register half the keys if you type fast. This app is great for iPhones and iPads. Make sure you get the platinum version in order to have the latest features such as backspace.

Stopped working. I have had this app for years. Worked fine. Now it stopped working recently w iOS and is worthless until they fix the bug. Completely unusable right now. Crashes every time.

Bug / calculator closes. I’ve been having issues with this calculator for a long time. As soon as I click CLX the calculator exits to the background. I cannot use this function. I’ve deleted and reinstalled the app, but the issue persists. I got a new phone, same issue.

Don’t waste your money. I purchased the “platinum version” of hp12c when the regular version quit working on my iPhone. Platinum also doesn’t work. Called HP technical support and a “technician “ in Bangladesh answered who had no idea what I was talking about. I asked to speak to someone in the U.S., was put on hold for 30-seconds & then the same person picked up with the same greeting I received originally. Very frustrating interaction with a company that I once respected.

Okay. Nothing spectacular, I would agree that the resolution should be better. -4 squared is not -16, so a few bugs. Financial calculations appear to work. A little pricey and should be updated.

Does not work (freezes at menu button). This app used to be great, but now it freezes when going into landscape mode and trying to hit the menu button. As everyone else pointed out, the obnoxious click noises are a non starter for me. HP, please, for the love of God, fix this app so I don't feel like I totally wasted my money.

New version problem. I use the app regularly. Following the last revision, the app will sporadically error out to the home screen when you hit clearX. Please bring back a version that runs consistently! ** The problem is caused by the load state at startup. If you turn that off, it works but you have to select all or rpn each time.

Beware it does not work. *Tip - Hit Menu>Reset before every new calculation and it seems to eliminate the error 5 messages in amortization calcs* Listen to the reviews. Hard to believe that HP would release such an embarrassment. But they did. It is not operator error by the reviewers. HP12C users generally know what they are doing on the handheld model and that’s why they specifically bought this app. Total fail and waste of money.

Unusable. It keeps crashing on every attempt to use it, therefore is unusable. I have an iPhone 12 running an iOS 15.4.1. In previous iOS versions it was unusable too. Besides, there is nowhere to find support. In a nutshell, this app it’s a DO NOT BUY.

Extremely disappointing.. Wrote a previous review but want to add to it. This app is so bad, I will never buy a Hewlett-Packard product ever again including computers etc. I wrote a previous review about this product and no one contacted me or anything else. And obviously since they don't continuously update the product they don't care whether it works or not.

Hp 12C platinum app on iPhone 11. I’ve used the 12c for almost 40 years. With this iPhone app, if I press CLX to clear the number from the x register, the whole app quits and closes. This is very frustrating. Why is this bug in the app?

Love it but fix the crash bug. I’ve used the app for years and love it. I really like that it’s 2 calculators in 1, depending on if your phone is in portrait or landscape mode. The last update introduced a bug that crashes the app. Workaround is to click on menu in the horizontal/financial calculator screen then reset. Please fix this extremely annoying bug! Would rate a 5 if this bug was fixed.

must have but fix vertical display. it’s a must-have and works great with a beautiful interphase however they display on version 10S iPhone is off center with the members.

So dissapointing - replicas are better.. Use HP12c daily. Was willing to pay HP a premium for their product as opposed to a copy. However, although this version says it's compatible, the restitution looks very poor and image doesn't even use entire screen. Lastly option menu won't open. Waisted money.

Application does not work and needs to be deleted and re downloaded. Grew up using this calculator. It worked great for a year but no longer works on my new iphone. Very difficult to get in touch with support. Would not recommend paying the money for this app. Unfortunate, but I guess I have to find a new calculator.

App doesn’t work for basic financial calculations. This app worked exactly the same as my 12C, but it now errors doing basic PV, FV, etc. I haven’t attempted to do cash flow since this happened but I definitely wouldn’t trust it if it did. It also closes randomly when you click the clear button. Useless, deleted until they fix it. Don’t even consider purchase before then.

Whats not to love?. With the latest updates, the bugs that people complained about are gone. This is app is the next best thing to the real deal.

Updated version works great. I’ve only used it a few hours and it works as expected. Mimics my physical 12c platinum. Kinda pricey but it’s an expense as I use it for work. iPad version is huge! Would like documentation on tips functions. Figured it out but it would be useful if there is a help function (besides the flip help on the back)

Embarrassing! Calculation errors!?. Hewlett Packard has a loyal following and a reputation for highest quality - and for correcting problems when they arise. (Early HP scientific calculators actually were recalled and replaced when a tiny bug was discovered.) But a business calculator that makes elementary-school math errors (e.g., in squaring a negative number) is unforgiveable! The calculator on which this app is based goes back to 1981, and among financial wizards both old and young, it is still the gold (well, platinum) standard! This iPhone version appears to have been introduced in 2009, which should have allowed HP plenty of time to get it working credibly under OS 3.1 or later.

Not supported by Apple updates. I’ve been using this calculator for over 30 years in different versions. Do not buy this app the developer has not upgraded it to work with the latest operating system for the iPad or iPhone. The Calculator no longer works! Upgrade this product or put a disclosure out that is no longer a viable product for Apple applications

HP 12c. Very satisfied. I just downloaded the app and it works fine. I was able to lower the volume on the keys. It flipped to horizontal quickly. It has nice new features like Undo if you clear a number by mistake. It has back space so you can correct a number. It also has a built in quick start manual for new users or if you forget how to input something. It's really great to have an HP in your pocket. Very satisfied.

Hp 12CP platinum. I have been using an Hp 12C for 25 years. I was excited to download the calculator to my phone. I’ve only had the app a few days but it is glitchy as heck. I can’t calculate anything without it closing out of the app. I’ve uninstalled the app and reinstalled and that doesn’t seem to fix the problem.

Full of Bugs. This app is completely awful. As others have pointed out it is full of bugs. It is not possible to use the advanced features and options, because pressing the menu key causes the app to irreversibly freeze. The only way to overcome the freeze is to hard close the app and reopen it, thereby losing all of your data. Tremendous disappointment and total ripoff.

The Original!. Nothing beats having the original calculator for IOS, from the original source. Now if only HP would complete the collection by publishing the HP-16C!

App Continually Crashes. I have used this app for years. This app is not being properly updated by the developer; this product crashes when making amortization calculations. My iPhone VR and now 12 have experienced the same issues; the developer’s web site does not provide support or even an option for communication relating to this app. Assuming there are compatibility issues relating to an Apple update that was never addressed. I have tried everything from reinstalling the app It used to be good!

Calculations are wrong. App crashes.. Worst app money can buy. It is a shame on HP to rob people by selling this app. Apple should ban this app for misguiding people to buy them. Especially when a calculator cannot calculate right and also crashes when you press clear.

I trusted HP -- BIG MISTAKE. My old HP12c emulator app was dated and the 3rd party developer was no longer supporting it. I thought that I would be safe if I went with the HP app, because even though it was expensive, I thought that as a reputable company, they would keep it up to date. That was a big mistake. THIS APP WILL NOT WORK UNDER IOS 11. It is not that it doesn't use IOS 11 features. It will not run at all. So for its high price, I got a month of functionality.

CLX key issue. I love the app as a replacement of my old 12C. But, when ever I press the Clear function ( in rpg) in either landscape or portrait mode, the app closes.

Great App. I love this 12cp app and it's my primary calculator. One big problem, on my iPhone 13 Pro Max the CLS button crashes to app in either hoz or vert positioning. Strange as I also have the 15c and it's OK.

App keeps crashing!. I used to love having this app on my phone! Handy when I didn’t have my physical calculator. But for some time now after doing a PV/FV/PMT calculation then next time I try do a calculation the app just closed! I can’t clear the registry, the app just crashes when I hit CLX. I then need to uninstall and reinstall the app to do a single calculation.

Needs update. I use this app on a daily basis, and it work on iOS11, it needs to be updated by the developers. Please update it so we can keep using a product we paid for.

Constantly Crashes. I bought this app when I had an iPhone 7 and it worked fine. As soon as I upgraded to the iPhone 10 it started crashing any time I hit the clear button or tried to do a future value calculation. These same problems have persisted now that I’ve upgraded to an iPhone 11. I would caution users to avoid this app.

ANNOYING Clicking Sound. There is an ANNOYING clicking sound every time a key is touched. Usually there is a way to turn off the clicking sound through the program. It is not user friendly to have to turn off the entire sound of the iPhone device just to stop the annoying clicking sound. VERY IRRITATING. I would not recommend this product until they fix the sound issues. I hate the clicking sound. I love the HP12C handheld calculator that I have. I HATE the iPhone HP 12C.

This app needs updating. The app worked fine for awhile, but now the finance calculation doesn’t work. I have to delete the app and then reinstall it if I need the finance application. I wish I had my money back. The aggravation is not worth what I paid, disappointing to say the least. Now I have to carry the actual calculator everywhere to avoid the reinstalling. There should be a fix for this!

Works sometimes.... This calculator would work all the time. But now over the past 6-12 months it works off and on. I use it for work and it’s starting to irritate me. I wish they could fix it once and for all!

No updates. What about update this App to retina and 4 inch display!? For 14,99 dollars it would have more support. Disappointed.

Glitch. Droid version worked much better, this version has a glitch that makes it restart when you hit clear and you have to reset it over and over.

Please update the app to a 64-bit architecture!. I use the HP12c Platinum calculator app almost everyday for years now. I sincerely hope HP will update it to a 64-bit architecture so that we, loyal and satisfied customers, will be able to continue enjoying this app in future versions of iOS! Please update it, please!

little bit expensive. good app when you are used to RPN financial calculator but expensive for that. The key click doesn’t work on I7+. Key vibration is annoying They should add key haptic return option

Latest Update Flawed. The iOS 11 update 2 years ago was fine. After the last update it crashes the app when hitting Clear and has too many Errors compared to real 12C calculator when running time value of money calculations. I wouldn’t purchase until they fix these issues.

Works for the most part, but pressing the “CLX” button causes app to close. If you are looking for a faithful visual facsimile of the actual 12C Platinum, then this should appeal to your eyes. Unfortunately, if you are also looking for a faithful reproduction of the calculator itself, you will likely be disappointed.

Do not waste your time. This specific developer has not been able to update this App to function within the last 4 years of iOS updates. Prior to that it worked great, just like my actual HP 12-c. During the last 5 years approximately I have reinstalled the updated versions and they ALL crash during financial calculations ALWAYS. Today I tried again and still crashes. Developer needs to take this App down or get it working. This is not a rare issue.

Works great on iPADOS 13.4. If you open the app, and then first press MENU and then RESET to clear all of the registers, the app works fine and does not crash when CLX is pressed.

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App Freezing. I have latest ios8.1.3 on iPhone 5C. When I open this app it is frozen. For a paid app I expect better performance than this. Worked perfectly (apart from annoying key stroke noises) on my 4S. Please fix HP????

Error 5. Same issue as all the other reviews ??? When will a fix be in place?

Can't be bother to update?. It's a paid app! Heck, it costs me $16! But can't be bother to update to iPhone 5 version? It isn't too difficult I hope.

Crashes. Bought the app as I have the physical calculator. The app does not work and permanently comes up with errors when doing a calculation. Have tried to report it to no avail as it was the worst money spent on an app. No response of fixes forthcoming from HP. Disappointing. Don’t buy this

Fix you app. Paid $26 for an app that keeps crashing. Please fix your app. Keeps crashing. Please advise of the next update or provide a refund.

Update Required. Apple have advised this app won't work after next iOS upgrade. Please update ASAP HP as this is one of my most used apps.

System Issue. Hi I cannot use this app anymore after upgrading. Please help.

Error 5. I’ve only just bought this app and am trying to use it on iPhone X with IOS 13.3. Can’t use NPV functions as they fail via ‘error 5’ as per amray411 review on Tuesday. Also, pressing the ‘clx’ button sometimes throws me out of the program back to my home screen. HP can you fix please? Thanks

Crashes Often - Do Not Buy. When it works it’s fine but it crashes so often it’s almost impossible to use.

iOS update. Need this ASAP

Update. When are you going to update this app so we can continue using it with latest Apple IOS?

Great but Noisy. Please, HP, enough of us have asked for an option to silence keyclick sound for long enough! Please fix this very annoying issue - the see how fast the fifth star appears.

Please fix. The app is continually kicking me out at the last step of every repayment calculation Has been amazing for the last 5 years til now.

App won’t load onto iPhone XS after working previously. Still after 2 months of not working on iPhone XS there has been no software upgrade. Not very good service. Please lift your game HP or provide another App to use if you aren’t going to fix it, people purchase your App to use on a daily basis so you need to find a solution which works on iPhone XS. It’s not like Apple just release the iPhone XS last week or anything.

Refund or help ASAP please. I’m doing a very basic calc and the app keeps crashing. Please help or refund ASAP. Calc is - 5 year term, 10% int, PV=-100. What is FV? When I input these variables I should get a resulting FV of $161.0510 - as per physical HP12c platinum. Instead the app crashes. Why?

Crashing for months. Guys, I’ve always been a strong advocate for the HP12C, however the app has been crashing and completely unusable since I updated iOS (more than 8 months now)! Please fix the bug so we can get back to business.

Virtually unusable. Consistently crashes, or produces error results when a good old fashioned hand held HP12C calculator produces correct results.

Crashes too often to be useful. Lol, don’t think this has ever been updated. It can barely load before it crashes. Useless and waste of money. Do not buy. It can barely open on the new update.

Update to iOS 11 please!!. I use my normal HP12c all the time as I am in finance. I love the functionality of this via my iPhone app ... but it needs updating!!!

app closes automatically on iphone as soon as you go into it. i love this app and it has been so good for many years! but for the past couple of weeks every time i go into the app it closes automatically 😭 this app is perfect for work but i can’t use it :(

Unusable - always crashing. Unusable app that crashes every time you use it, it cannot get through a single calculation without crashing. Very disappointing

Crashing. Keeps crashing, other versions that are free work much better. Don’t waste your money

Crashing. Since the latest Ios started crashing. Deleted app & reinstalled. Argh! Now as soon as I touch a button it crashes. Pls. fix HP. I’ve had the calculator since 1992 but loved the app as it was so handy. Now it’s useless!

INCORRECT CALCULATIONS. In the finance business, the HP 12C is an icon and is crucial for everyday calculations. I can’t believe how poorly this app is put together for an app that costs AUD$21. My handheld 12C calculates correctly, this app doesn’t. Lease Example: 90,185.04 Enter CHS PV 0 FV 60 N 6.6 G i PMT Answer shown = $1,768.80 (Should = $1,759.13) The question now is: HOW CAN I TRUST IT?

HP - have to use iphone noise on off switch why?. Raised sound off query with HP. They emailed me they would look into it & no response Only work around I found was turn off phone noise. What if you forget to turn back on & miss that improtant notification. Calculator seems excellent. Manuals for complex calculations easily downloaded from HP site

Update fixes long standing issues. Thanks for the update HP! Now the vibrate on key press is an actual haptic feedback instead of old style vibrate, so I’ve re-enabled Key Vibrate in System Settings -> HP 12CP, and the app now correctly loads the previous state. Looks like it’s introduced another bug though where the app can crash when you press CLx... I’m sure you’re getting the crash reports so hopefully this will be fixed soon :) Thanks again! The only calculator app I use on my iPhone when I don’t have my actual 12C with me...

Crashing a lot since IOS update. It's almost unusable it crashes so often. As I look through the comments I see that this has happened many times before. Come on HP, we love that you made an app version but you need to test it and update it if necessary before each and every IOS update! I'm going to switch to one of the clone HP12 apps since they'll likely be better at keeping theirs updated. *Update - I actually like the clone app better!

Saved over $100!!!. Love this app!! Why buy one for over $AU150, when you can just use this app!? This is the greatest thing since the iPod became part of your phone. I'm needing less things in my pocket these days. Makes going to work easier Thanx Apple and HP. :)

Needs updating. One of my most used apps, since I lost my real 12c please update to ios11

No longer functional. App does not open, needs an overhaul

Calculations are correct. I can’t understand why no one (even HP) have corrected the review by gride286, about 3 years ago (2016) titled “INCORRECT CALCULC...” gride286’s problem is that on one calculator, the PMT was calculated assuming that the payment was made at the start of the period (g>BEG), and on the other Calculator the payment was made at the end of the period (g>END>). This choice is hard to miss as a small “BEGIN” shows in the screen. Generally, such as a lease payment, payments are made at the end of the period, but some financial transactions such as receiving an Annuity, the payment might be made at the beginning of the period. Otherwise, a great app, exactly like the physical 12C I have had and used for 30 years.

Not updated to work with iOS 11. No longer works

DT. Ever since last update the App drops out every time i hit the clear key. ???

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Keeps on crashing since the last update. Since the last update, when I hit the CLX key, the app crashes! This makes the app unusable. Please fix this issue. Thank you

Mr. It functions but the keys are very hard to read (and I'm young with good eyesight!) because they haven't bothered to update the app for retina display. For the price they charge, you'd think they can solve this easy problem--which lead me to conclude that they don't care. And do you really want to purchase a product that is manufactured carelessly?

Cassander1. This app has stopped working - perhaps HP could respond to tell us when the ETA is to get this fixed?

What’s with this irresponsible developer?. This app is NOT free. It’s been crashing spontaneously across the user spectrum. Apple should insist on a fix or remove the app, refund the users, and sue the developer

Not working. It’s not working. If you are not going to fix it, you should refund the users.

Same issue as other mention…CLX. The app crashes when CLX is clicked. Not sure if it is compatible with iPhone 12 Pro Max.

Doesn’t work anymore!!!. Keeps crashing, can’t open! Fix please!!!

Crabapple.. This is junk... Doesn't work on my 6S plus - I do a simple arithmetic calculation (I.e. 6+6) and then it freezes and won't do a thing! What a rip-off! Piece of crap!

Do not buy/nor upgrade. When pressing CLX the app crashes. Waste of money.

Not working anymore. After the update (the first in years), not working anymore! Please fix it...

Does not work anymore. I really love this app and used it daily, but now it does not work anymore Please fix

Won’t Launch ?!. Stopped working after latest iOS update. Refund please.

Last iOS update made it in usable. Several bugs cropped up after the last update, prior to that the app was good ... hopefully hp will update it ... been 3months now so not holding my breath ... they probably want us to just purchase another version... good thing I still have the physical one that neither Apple nor HP can’t break with “updates”

Stopped working after latest iOS update. O longer working

Update: works finally. Update: 2019-02-12 I think a lot of people, myself included, have given up on this app and removed it from their iOS devices, hence the lingering bad reviews. Low and behold, HP actually updated the app, and it works, just like the actual calculator. I am not giving it 5 stars because it is not optimized for the iPhone X (the bottom part is partially blocked), and there is no explanation of how tips work when in portrait mode. —————————————————- As of today (May 2013) there has been no update, no retina display support. So buy it only if you really NEED the original 12C, otherwise there are plenty out there with a nicer UI and work just as we'll.

Update doesn’t work.. I just updated the last version and now the Apps doesn’t work. It doesn’t open the calculator. I can’t understand how a company such as HP releases an update that doesn’t work. Will never buy something from HP again. Since I purchased this App it newer works well and HP never fixed the problems. Any new update is a nightmare. This product is defective since the beginning. Suggestion to preserve the good name of the company. Discontinue this product from the Apple store and allow the people that paid for this product to download the HP 12 C standard version free of charge.

needs fixing. App keeps on crashing since last update. Please fix!

Awsome. Plainly the best hp has.. This app is not just another app. When I put it in landscape it has all the functionality that my regular 12c has. All calculations are exactly what the real calculator does. I recommend this to all who want or need a financial calculator and at $19.99 it's still $130 cheaper than the real thing.

Extremely disappointed!. I used to use this app all the time. I paid for ir and it stopped working completely. No refund. No response from the developers. No updates to make it work again. They have other apps for sale. Is anyone fool enough to buy them? It feels like I’ve been robbed like all other users who posted their disappointment here. This app should be removed from the app store.

Not updated - do not buy. I’ll update my review when the calculator works. They charge you money for something that doesn’t work

Needs to be updated.... Does not run on iOS 11, will happily update review once app is updated.

Help - won’t launch. Like others, I paid a fair bit for this app and very annoyed that it no longer works. I tap on it, get a blank screen and back to my home screen. When it it going to be fixed? Wanted to give it zero star rating but was forced to give it a star :(

Please fix this app. Please fix this app, calculator keeps crashing

Really HP. You don’t do anything to this App for years (it worked fine) then release a so call ‘bug fix’ and stop the app from working! Please fix, TEST and RE-release bug fix.

Won’t launch. Absolutely no good please refund!

Hp12c. I paid $21 for this app and now it won’t open. Get on it HP

Great app until update, now doesn’t work????. Please fix this app!

Worth the money. I had been using the clone of this calculator, available here also, for quite some time. It was very good but it isn't this calculator. This one is the real thing. Vertical it is a normal calculator with a tip function that you will hardly if ever use. Turn horizontal it is the HP 12C. A familiar and useful friend. Touch the hp logo and it flips for an instant cheat sheet. Press menu and an abbreviated manual is available. I found it hard to read the key sequences but it is enough. Simply: There is no substitute. Buy this one.

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Shutdown problem. On an iPhone 11Pro, note the app shuts down when you try and clear an entry using the CLX button.

HORRIBLE. everytime i open the app and try to do a problem, at the end of the problem the app just shuts down & exits out. does it on my iPad and iPhone. Very pathetic considering you pay for this app. DO NOT PURCHASE.

HP-12c app does not work. This is a rip off. Calculations are often wrong, when I can get the app to work at all! Almost every time I hit the Clx button it turns off.

Stopped working. Used to work find but now I get Error 5 when I should not, and the app crashes. My physical HP12C will confirm that I am inputting the numbers correctly but still getting error 5.

Sound too loud. the sound when you hit the keys is too loud. pls rovide option to turn it off. If that option were available rating would be a 4.

Crashes any time I press CLX. Just annoying. The 15C app doesn’t crash like this, so I rarely use the 12c anymore. Please fix this.

Disappointed. The calculator works great, but the resolution is awful. It's as if it was developed for the lower resolution iPhone 3G and never updated for the higher resolution iPhone 4. HP desperately needs to update this app.

Shuts down. For some reason the calculator will shut down and returns the phone to the home screen when trying to calculate a payment when the payment key is activated.

Doesn’t work keeps crashing. Not sure how this is allowed to be available as if doesn’t work at all.

Key click problem. This would be a four star app if not for the problem of the key click - or should I say the DOUBLE key click. This has been a problem forever ... please FIX IT!

Need to get my money back. Touch the "menu" button and the app freezes/locks up. I sure wish I had read the other reviews; I trusted HP to put out a quality app.

Functions don't work. Basic calculation doesn't work. Menu doesn't come up with anything on it. Been using the basic 12C for years. This version stinks. I would like a refund. How's do I get one?

App constantly crashes. I have had this app through multiple phones and it has altars crashed. Mostly when you hit the clear button.

Doesn’t work consistently. I have used a 12c since the 80’s and know it well. This app does NOT work like the real 12c. Try another app.

Tip calculator feature on vertical mode. Unable to figure it out. How the heck does it work?

Having problems with current app version!. How I can install the previous version? HELP

Advanced functions do not work. This app is terrible. It’s just a simple calculator disguised as an hp12c. You can’t even calculate simple future value function. I have used the hp12c for 15 years as a commercial real estate appraiser. This app was a waste of money.

Last version doesn’t work at all. Since the last update the app is not working anymore. Please fix this problem.

App is defective. This app fails when calculating payments on a mortgage. I works the first time after download from the App Store, then fails with Error 5 after this. Very poorly done and no support.

Horrible. Constantly crashes. Had to delete app and reinstall. Works for a few calculations and then app freezes or exits and you have to start all over again. DO NOT BUY this app!!

Way to Buggy. Ever since a couple of updates ago, the app continues to crash. It appears they only update this version once a year I guess I’ll have to go back to the physical HP 12C Platinum I bought in 2006.

Works fine. Needs large screen support.

Piece of Crap. Constantly closing on its own and computations are constantly calculated as an error depending on the day of the week, or the temperature of the day. Going to purchase the handheld version instead. Save your money!!!

HP12C Platinum. Updated to IOS 13.4.1 HP12C Platinum will no longer work. I like the calculator and have one but I would like to have the app working again.

Pressing CLX Crashes App. Often, when I press CLX (clear), the app crashes. This doesn’t happen on the non-platinum version of the app from the same publisher.

CRASH. Did the recent update and crashes when trying to open. I really rely on this app and very frustrating it’s not working. Come on HP!!!

Crash, Works, Crash, Error, Error. Jan 2021-This app is almost useless now. Crash and error or so frequent. I understand iOS updates probably interfere somewhat but this is ridiculous. Error 5 and crashes.

Waiting for the app to match the physical. Hopefully the 2020 app will soon match the power and accuracy the original 1981 technology its meant to mimic. The app crashes, displays error messages inappropriately, and has actual computation errors. Somewhat of an unholy trinity for a calculator. Looking forward to its update.

HP12C Platinum regularly crashes on iPhone. I’m noting that this app crashes on my iPhone when I hit the clx button.. every time. Does this app work for anyone?

Doesn’t work anymore. This used to be my go to app for mortgage calculations. Now I get an Error 5 when I solve for monthly payment. Super annoying. The only work around is to delete the app and reinstall it EVERYTIME! I want my money refunded or this bug fixed ASAP!

Doesn’t work. The app won’t even solve for basic functions. It crashes less than a min after opening

Worse than 12c Gold. The fact that the users who paid more expensive for 12c Platinum stopped getting updates and support because HP decided to focus on 12c Gold is outrageous. I want my money back or free access to the regular 12c version!

Crashing Every Time. I’ve used this app for years and it mostly worked. But the last couple of years it crashes every time I try to use it. I have resorted to carrying my physical HP 12 C around with me instead.

Broken. This app used to work great. However, you cannot even do a basic loan calculation without an error. This has been broken for a few years now.

Junk!. I’ve used an HP 12C for 20 years to calculate amortization payments for loans. This app either shuts off completely or gives an error 5, 9 out of 10 tries of entering the data and hitting the pmt key. How can the calculator be so great and the app be such junk?!

disappointing. Crashes frequently. The CLx button, when in portrait mode, will crash the app every time.

Terrible. Unstable. Unreliable DO NOT BUY. Crashes constantly, leaving me to start over at least 5 times for even the simplest calculations. Pick another version. AVOID THIS ONE!

Crashes when opening. Great app when it works and appreciate HP updating it especially after it languished for years. Unfortunately this version won’t open on my iPhone XS.

HP 12C Freeze. I tried multiple installs on my iPhone 6.0 but the calculator keys keep freezing and stop responding. Touching the Menu key makes it happen every time. The noise of the clicks is obnoxious as others noted. Don't buy it!!

Double clicking issue. This thing is irritating! Why does it close when I hit the clear button? I paid HP for this, thinking it would be the best. Waste of money.

Clicking Sound. Please correct the annoying clicking sound!!! Also please develop an option to turn it off.

Calculator that does not work. It’s a ripoff as the calculator does not work and delivers calculation errors for simple math as well as time value of money. Sad to feel ripped off with purchasing this app. Stay away.

Keeps crashing. This app keeps crashing, despite automatic app updates AND iOS updates. Basic financial function like loan payment…crash. Update the bugs. Or users…pass and save your money.

App not working properly. Ap crashes when clx button is pressed, annoying but, lacks on updates

Decent. Buggy and can’t open the newest version of the app after they’ve updated it. Two decimal places Issue cited in other reviews also very annoying.

hp should be ashamed.. Won’t do simple financial calculations. Constant crashes. Provides incorrect answers. Can’t believe hp would put something this flawed on the market. Very disappointed!!

Why not lock it in landscape???. I had a knock off 12c that was perfect but recently disappeared from my phone. This knockoff would ALWAYS appear in landscape and you simply turn the phone. Now I have to unlock my screen orientation to use this app. Sucky!

App won’t stay open. Every time I open the hp 12CP platinum app it immediately closes. Considering the cost of the app this is unacceptable, not to mention in my work I depend on this app!

Waste of Money. Downloaded the app and it worked fine for a day, but now it is super glitchy. Every time I press the CLx the app closes or if I try to calculate a TMV problem it closes when it should return the answer. Waste of $17, I’m just buying the real thing now.

Lame. When you hit clear, it goes to the Home Screen. Used to work well before the latest update.