HP 12c Financial Calculator App Reviews

Much Improved Touch Interface. Thanks to development team for hearing user concern and improving the touch interface in the latest version.

Orientation issues. Since the last update orientation has not worked correctly. It locks without manually turning the orientation lock on or off. If it vertical with the lock off and you turn it horizontal it does not reorient. Turn the lock on then turn the device vertical and it remains with horizontal orientation. Go turn it off and the endless cycle continues. Nothing in the support area addresses any of this.

New version has corrected display problems and is vastly improved. The portrait display is a major improvement for those of us who prefer to use our iPad in that orientation.

Continuous memory still missing. Thank you for fixing the IPad version of the latest update, but the continuous memory function on the IPad version still does not work. The IPhone version works great and I would give the revised IPad version 3 five stars if still had the continuous memory feature.

Decades of Dependability. HP12-C has been my single source of any financial or mathematical aid through college in the 80s, through 40 years as a principal broker in real estate, and now in my every day living! I have Two physical handheld, but rely every day on the app on my iPhone! HP 12c, you are everywhere I go!

Fixed!. Orientation issues have been fixed. The Developers get kudos for their fast response and rapidly fixing the problems. Once again, post update, the ppis working as intended. No more problems!

Problem now fixed. UPDATE. The developer reaches out to let me know they had an update it all works great now. The app is back to one of my favorite: The update update takes all the keys and spreads them out all over the screen makes this app unusable.

Finally, Back to Business!. Thanks to the developers for actively chasing down and correcting the bugs in this first major iOS overhaul in years. Once again, the app is a pleasure to use and the choice of portrait mode layouts is a nice touch.

Love This App. I’ve always used an HP-12 calculator and now I do not have to carry it with me. This calculator is the real thing and the new upgrades are just phenomenal. Thank you for bringing this to the App Store.

Nice update. The latest update was of benefit to the iPhone (5-stars) - giving access to TVM and % change buttons in the vertical format. Very nice. I have a physical 12C on my desk, but usually just reach for this app.

50+ years of excellence. The HP 12c has been my go to financial instrument for over 50 years, from my undergrad years and through my business career. The iOS version is an authentic representation of HP’s legendary calculator and a must have for me. Highly recommended.

Greatest of all times!. I used this calculator for over 40 years (the real one) conducting real estate & manufacturing business. This version is exactly like my old handheld calculator. I use almost every day……..

Developer fixed the app for iPad. Pleased that the developer fixed the format issues. App screen looks much better and works well.

DON’T Update. Ruined the app.. Previous version worked great for years. Saw that it was finally updated and thought sure I’ll give it a try. I now hate it. The keys are so unresponsive to taps that the only way to actually enter the number that you want is to do it about 1/10 of the speed that you previously used. Any kind of normal quick entry of numbers Will screw up the actual number entered and give you a totally a ruinous result. Can’t trust it or use it quickly at all. I wish I could go back. Please restore the prior version for those of us that go work on a different app. Thanks.

Need RPN?. This is the ticket. I sometimes think RPN is particular to lefties. No learning curve unless you are right minded (pun intended). I started with an HP41C back in the eighties. OK, I will admit it - the logic used in the operation of "normal" calculators drives me crazy. Thank you HP for providing the 12C for the iPad. Lots of Fish

The best!!!!. These recent upgrades have made the app so much better. Being a 25 year user of my original 12c (still going strong) this app is the next best thing!!!

Keying is inconsistent. I’ve used the HP12C format for over 40 years. I have 2 issues with this app. 1. Key pressure required to register a number on the screen is inconsistent. I’m frequently missing numbers when entering them. Very frustrating because you are focused on the keyboard not the screen. 2. I can set the positions right of the decimal (I like 4) but it reverts back to 2 when the app closes. It will not retain your setting.

Ruined app, now even worse, 10 negative stars!. The only word I can use to describe this is moronic. It is clear that no one even bothered to load this app on an iPad and even glance at it! Half the buttons are missing! This is completely useless. They sent me an email announcing the new version and saying the landscape mode issue is fixed (it isn't) and would I please revise my review. So I did. Why in the world did they screw up a perfect adaption of the 12C? On an iPad, landscape mode s not available, although it is listed in settings. Stupid over think.

Don’t care for recent upgrade.. I love hp12c calculator and was pleased to find there is an app for my iPad. However, there was a recent upgrade(?) that has changed the appearance of the display that I am very unhappy with. Previously the display on my iPad was just like the actual hp12c calculator I have owned for many years. I would much prefer not to have the upgrade. Update: I am amazed to have received a response to my comments about the hp12C app for iPads. And quite pleased with the suggestion that I install the 3.1.1 update which I have done. The 3.1.1 update has largely solved the issues I had. It’s a relief to have the hp12C app fixed. Thanks for the quick response and for the 3.1.1 update.

Oh man, the 3.1.1 update was terrific. Very nice to have fixed many of the 3.0 problems like memory loss but to also bring back the classic portrait keyboard and then to give the user options to place the smaller keyboard high, middle and low on the screen was a very surprising and VERY thoughtful touch with the design. I actually prefer the old program's "photographic" landscape look for the keys and slightly thicker digit display look better, especially on the iPad, but that is a a small complaint. The V3+ updates are just outstanding! Having the full calculator keys in portrait mode on the iPhone is just brilliant. I'm not sure I realized that this rotation from landscape had enough keys in portrait mode to do that but it does.

Thank you!! - looks great on iPad today. Update 4/30: Thank you for taking time to fix the iPad layout after the most recent update. I haven’t fully gone through the app (the only reason for 4 stars instead of 5), but this looks GREAT! Returned the usable layout, and still delivering improved graphics, etc. Love it!!! Thank you for being so responsive! …………………….. …………. From earlier in April 2025: I have loved using this app for 10 to 15 years on both my iPad and iPhone. I use the app a few dozen times per day… mostly on my iPad at my desk. Today’s update messed up the interface on the iPad… buttons look oddly spaced, etc. I hope that gets fixed soon!!!! Yesterday i would have given 4 stars. Today i give 2 stars. I acknowledge it looks like a lot of work was done and it looks crisper, but it no longer looks/feels like a 12c on an iPad.

Great App, It Makes Me Feel Fancy. So since my senior level finance class in college I've been using my HP 10b when I don't have Excel available. I bought a real HP 12c recently, meaning sometime shortly after 1980, because it makes me look like Mr. Fancy Finance Guy. Having used algebraic calculators for over 100 years, I needed to practice RPN, so I got this app. Now I brag to all these 20 to 50 year old whippersnapper finance colleagues of mine about how I can use RPN and they can't because it confuses them since it's not the Excel IRR function or whatever the latest new Excel finance functions they've come up within the last 50 years are. They say RPN is faster than algebraic notation, but I like RPN simply because it's confusing and esoteric and being able to use it makes me better than everyone and I win. So there. I recommend this app.

I left a bad review and they fixed everything. I was very upset at the first update of the HP 12C as the screwed up the keyboard and the calculator failed to hold formulas. ALL FIXED! In addition the developers emailed me personally through the process. So good I bought the $26 engineering calculator for my programmer as a gift!

ISSUE RESOLVED 😊 (COMMA WHERE DECIMAL PT SHOULD BE & VICE VERSA). UPDATE: DEVELOPER RESPONDED TO MY REVIEW W INFO ABOUT HOW TO CHANGE THIS IN THE APP SETTINGS. LOVE THE APP AND VERY HAPPY TO GET A PERSONAL RESPONSE TO MY PREVIOUS REVIEW! I just opened my HP12c financial calculator app and I have commas where the decimal point should be & vice versa. I checked my account settings and it still correctly shows my region as the US. Is this a glitch that the developer can correct or is there a way for me to fix it in my app? On an ordinary day, I rate this app as 5 STARS. Today, I’d give it 2 stars… but I’ll be happy again when this glitch is corrected.

update 3.1 updated review. the developer has fixed the interface issues presented in ver. 3.0 - as an hp 12C user from when the physical version was released in the 1981, I can recommend this implementation on the iPad - I have updated my prior review to reflect the updated interface in ver. 3.1.0.

Roll back. The new screen is awful. Just plain ugly and no longer has the classic look. Revised… well, this was fixed very quickly and the display warms my retro heart.

Split Screen. I’ve been using this app since 2012 and love the v3.0 update. It’s everything you could want in a financial calculator. If I’m remembering correctly v3.0 allowed for “split screen” functionality on the iPad, but in the latest version 3.1.1 it appears that function is no longer available. I hope it comes back in a future app update as the split screen function is very helpful. Thanks again for such a great app!

Excellent financial calculator. I’ve used a handheld version of this calculator for over 40 years & loved it. This app is a near perfect replica of the handheld. Be advised that, like the handheld, it uses Reverse Polish Notation (RPN), also known as postfix notation, which is a mathematical notation where operators follow their operands.

Don't fix what's not broken. The update in mid April 2025 ruined the user interface. I don't know what internals were touch as the numerics seem unchanged. The previous release gave the appearance of a real 12c. This latest release spread the keys proportionately far apart and the key "names" are much smaller. Who cares about rearranging everything in the portrait mode. It was fine the way it was. If the 15C emulator is change in this way then I will leave the update forever alone. This is a huge disappointment. I bought a new real 12c. It's quite fast but looks the same. That's called improved. I'll just put that in my pocket from now on and leave this emulator alone. Worse, the money calculations are incorrect. Verified with an original hp12c calculator, a new one today, and a Mathematica notebook. Even got the r same answers with another iPhone/iPad app. Very disappointed. I don't recommend this.

Used to be a clone, but not anymore. This app used to distinguish itself from other 12C apps by looking precisely like the original calculator, which is why I was willing to pay $15 for it when others were cheaper or free. Some time ago, it was modified to be “more modern“ and now looks like complete garbage—it doesn’t even appear to be produced by HP. If it looked and functioned like it does now, I never would have purchased it. Please restore the original version, or at least make it an option. There’s a reason this particular calculator has stood the test of time.

The best ever. So happy to have this app on my iPhone! I still have my original 12c from 35+ years ago and it still works great. But nice to not have to carry it now that I have this app!

Version 3.0 Ruined a Great App. My original one-star review of version 3.0 was deleted and this app’s rating magically improved from 2.5 to 3.9 stars overnight—don’t be fooled. This newer version ruined a great app. They rescaled the button positions ruining the muscle memory that made the app seamless for users of the physical calculator. The portrait version was updated to include financial functions in whole screen mode, which made the user interface cluttered. Going back to the knock-off app.

Managing director. I do not like the new layout. Buttons are too small, too far apart, hard to be sure you pressed them. Settings says you can change from full screen but it does not change. Seems to be fixed now, buttons are bigger.

[Updated] Snatches Victory Back from the Jaws of Defeat. Compliments to the developer for quickly fixing the flaws of the prior update, which had created a very user-unfriendly interface on iPad | This new-&-improved version is better than ever now!

Step back from before. Please revert the graphics to the old style, was much more realistic, like the 15c app still has... I had a 5 star review before, ignoring the previous iPad portrait glitch with the numbers outside the display, but the new "modernization" completely ignores the classic look and feel of the calculator we grew up with...

User. I want to thank the developer for its acknowledging my problems with this application. I received an email directly from the developer informing me of a just-released 3.1.1 version which I immediately downloaded. It appears to solve all of the problems I note below. Update lost all my stored information. Commas are where periods should be and vis versa. Hate the full screen layout on an iPad! The update needs an update and in a hurry! I have installed Version 3.1, and neither the layout, which is almost unusable, nor the commas being where periods should be and vice versa have changed! How can this continue? NOW, in addition to the problems previously noted above, the App forgets all stored numbers within hours of entry! After almost 50 years of using the original HP 12 C hand calculator through various versions of this calculator for iPad I have never had anything like this. The App is effectively useless. In fact, I have never had an app of any kind purchased in the App Store that had a single significant issue, let alone so many issues that the App was useless!

Better than ever — better even than the original HP calculator. I’ve been using this app since it came out many years ago. It replaced my old trusty HP 12C, which I’ve had since the 1980’s (and which has sat unused in my desk drawer for decades). Why should I carry it around when I have the identical operations and keyboard layout on my phone and pad? With this newest version, the app fixed the remaining gripe that I had: the ability to copy a result and paste it into a different app. Now I consider it perfect!

So much faster than original. Broke out my old HP12C to work out a ‘change date’ problem. It churned but gave me the answer I needed. Out of curiosity, bought the HP12C app then ran the same problem on my iPhone 15. The answer appeared instantaneously. Initially, I missed the ‘crib notes’ that are on back of the original calculator. I subsequently found them in the ‘Menu’ under ‘Helpful Settings’.

Get this app, NOT the platinum version. I use the HP 12C platinum calculator irl, and hated having to forego RPN calculators for on the fly needs. I initially got the app that matched my calculator–the HP 12C Platinum–from the same developer as this app. It was $3 more expensive, yes the buggiest app I’ve ever used. Hasn’t been updated in 4 years and genuinely crashes after the simplest inputs. I tried complaining or requesting a refund the same day I bought it but to no avail. Luckily I saw this version got an update and it’s been running like a charm. I’m super happy with this product, but still irritated I spent $18 on an app that doesn’t work and they refuse to take it down or update it. This app = great, and I wish I didn’t feel so jaded.

Can’t figure out how to change the comma to a floating decimal point since there is no off button.. Much easier to have the functionality on my phone instead of carrying the calculator

An Excellent Must Have. Must have for any business professional. Would love the option to change the app appearance from gold to platinum as that is what I have on my desk.

Fixed! Happy!. When the new update came out (3.0), I could not read my calculator correctly as I use a larger font on my phone. I wrote to app developer and said I wasn't happy. They fixed the problem w/an update (3.1) and now it works as great as it always has! Thank you to the developer for the quick response/fix. I use it daily, so it was a big deal to me to have it work. I appreciate your work :)

Emulator. Emulator works good. Unfortunately, the actual calculator is hard to find and is now of such poor manufacturing quality as to be non-usable. So, this emulator is the only option.

Great HP12c improvements!. Only tactile feedback needs more work. I keep on missing keyed numbers, and the clicking sound feedback sometimes is too delayed. That us the only thing that requires attention. Everything else seems perfect. The portrait layout is fantastic. Just the tactile feedback is not perfect.

Back to great. Can’t find my old review, but the recent changes have brought this app back to 5 stars. Thanks for listening to your users.

Major step backwards in design. Don't upgrade! This will destroy the entire reason you wanted to use a HP 12c. Note to HP, if this new design is so good, then offer BOTH the older version and the newer design, and measure how many HP-12c enthusiasts uninstall this new version and reinstall the old one. That is a good way to test this new version statistically. Again, have a "revert to old version" setting and measure how many people reinstall the older version, because it was so much more usable.

Great upgrade!. Version 3.0 took this from an adequate 12c emulator to a great one! Portrait orientation now has all 12c buttons available, and the interface looks cleaner. Also dealt with annoying problem where some controls were very close to area on screen that activates Siri I really don’t understand the reviews complaining about the layout. When rotated to landscape it’s IDENTICAL to a ‘real’ 12c, and in portrait there are now more functions available. Yeah, the iPad version is different, but I prefer it to a phone sized screen floating inside an iPad sized app

Made me Money. Benn using HP12C since 1981. Used right will make you a huge amount of money. Such a great tool used daily will return 1000’s of % over your career. Need the RE tools to do so contact me.

New Layout. I wrote: HP redesigned the layout. I wish there is a legacy option to use the old layout. I like it better. Follow up: I updated the calculator in the App Store to version 3.1.1. which now includes an option to switch between a modern view and classic view. In the classic setting (the “old” layout), the full functionality of the calculator is still available in the landscape view. Thank you HP for the option to toggle between the modern and classic views.

Would be 5 w or 1 change. Have always loved this calculator. With the new update, things are nicely refreshed but when you tap a number with normal intensity, it doesn’t register. you have to push very hard on each number. This should be an easy fix to allow a softer touch to register a number, if this was done, my writing would be a 5+

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Key presses very difficult in new version. Since the recent update the keys seem much more difficult to “press” and it is too easy to make mistakes. If I could, I would roll back to the previous version (which I rated five stars).

Layout. The updated layout is simply awful on the iPad. It needs to be changed back to the previous version. I’ve chosen to download a different rpn calculator with a layout I’m more familiar with. To the developers - stop messing with something that worked and looked like the original. Very poor. Had I known it looked like this I wouldn’t have purchased it.

David. Brilliant!

Good but no keyboard support. A very good calculator spoiled only by not having Bluetooth keyboard support.

Commas v decimal point. It can’t be changed on the app. There is no on off button Please fix or provide a solution

Brilliant calculator. I have used the HP 12c for years and I am delighted to have it available as an app on my phone

IPad Pro requires update to app for HP12c and HP19BII. I have used HP Calculators since 1973-4 initially HP97 I think. Having it available on the iPhone and iPad is sensational. However my new iPad Pro will not open. The app motive is on the desk top but when actioned it turns screen to portrait shows black screen with HP logo and then returns to the desktop. Also in transferring to ne iPad Pro I have lost the anniversary model. 😩

HP 12C. A true application of the original handheld, except for the sound. Not having the option to switch keystroke sound off is annoying and disappointing.

Good but needs updating. This is the best 12C app out there as you would expect, however it needs updating to support iPhone 5, 5s, 6 and 6 plus screens. It really looks poor on my 6...

Prefer previous version. I don’t like the new version as it’s slowing me down. How do I revert back?

Changed screen layout. Why have you changed the screen layout… please change it back!

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Updated for iOS 11. Finally updated with 64-bit support the day after iOS 11 came out! Thank you.

Keystroke rate too slow in new version. Excellent App, BUT keystroke rate in new version is too slow. I have to slow down entry or it misses numbers.

The new version 👎. The new version is not good. Why change something that works?

doesn't work.... on the original version of ipad, does not show any functions beyond those of a simple calculator... please fix it, HP!

Version 3.0 is a step backwards.. The UI of this app prior to 3.0 looked great on all devices. Version 3.0 released today and looks terrible in landscape mode on a 13” iPad Pro. The buttons are small, vast amounts of whitespace all over, and an oversized Enter button. Basically unusable on this device. Devs, I hope this gets addressed soon; the previous look was much better, authentic, and honestly did not need much tweaking. I can only hope the companion HP15C app does not get this terrible UI overhaul.

Exactly as it should. I do not agree with the preceding negative comments. As someone that has used the physical 12C for years, this app is true to the original. Using this on the iPad2, I find the graphic quality is stellar. Since using RPN (reverse Polish notation) the first time, I found it logical and straightforward. If you're thinking of buying this app and you haven't used RPN before, you owe it to yourself to spend 5 minutes training yourself, you'll love it. Yes, there other free apps that purport to emulate the beloved operation of the HP 12C...and I've tried pretty much all of them, but this is the one to get. The other "free" apps are all lacking. Today I found this app on sale for $4.99 as a special for the upcoming school year (september) and grabbed it having watched the pricing for 6 months waiting for a price drop. Kudos to the designers in keeping this app true to the original, 5 stars for sure, 10 if I could!!

HP 12C. This application is not a 12C it is just a simple calculator that you can download for free elsewhere. Product is not what is displayed.

Downgrade. Commas and decimals reversed. Layout is now ridiculous with all that space. Who changes just for the sake of it

I prefer the original portrait UI. I would revert to prior version if possible.

Terrible. How can I revert to the previous version? Don’t like the layout. The keyboard is very slow. VERY Difficult to enter decimal points. THE OLD VERSION PLEASE.

Outstanding App. The new HP 12C Financial Calculator is an outstanding app. I love its new interface. Even more importantly, I love using RPN notation. Having been raised on RPN during my university studies, the HP12C feels comfortable and familiar. The HP12C Financial Calculator is one of my most commonly used apps.

Upgrade to iOS 17 broke it. Display is not aligned after the upgrade. Please fix!

Love my 12c. True to the original physical HP 12c. There are other RPN calculators for the iPhone, but I want my app to work just like my physical calculator. This does it. Love that I always have my 12c with me. If you don't know what RPN is, you probably won't like this. When I got my first HP calculator in 1976, it took 2 days to get used to the process. But I've never looked back. Much easier way to perform calculations than the standard calculator.

Hp 12c - for the iPhone. What a rip-off! I have it on my iPad - it works great - on the iPhone it is a joke - where the hell are the functionality keys! This is nothing more than $2 calculator. Fix this !

Only can see half the calculator - please fix. Love the 12c and RPN entry. This display is only showing the right side of the calculator. That side you get works great. You don’t get the left side keys which do so much like NPV, IRR, exponents, percentage change, or even changing the number of decimals displayed (it is stuck at 2 decimal places. Until this is fixed and you get both sides, I don't recommend anyone buy it.

HP12C. I have been using various models of HP Calculators for years. They are by far, the best financial and general purpose calculators available on the planet - the best feature being RPN. Once you have used and mastered RPN you will not ever want to go back to basic methods. Accolades and a HUGE thank you to HP for this App. Finally, we have a superb calculator for the iPad and one that works brilliantly. Worth ever penny and has my highest recommendation.

No longer Lazy on updates. Update on my relatively positive review: a small issue. The update seems to break the memory when you sit the number of decimal places. I hope I don’t have to wait years for that to be fixed. Also continuous compounding (STO EEX) reset so they have obviously changed the way the Calculator app runs. Given that it can potentially run on a Mac they should allow keyboard inputs as well Recent review: After years of waiting my favourite calculator has been updated! Please continue to support it and perhaps also make a reliable physical version! Old review below: Shame! You destroy a brand by slacking off on updates. My phone is unstable because of this outdated app but I rely on the 12C daily. Update it or pull it, just don't further frustrate those who have been HP fans for years.

Disappointing display. Big fan of HP 12 C but the display on iPhone X is poor. It does not adjust to the screen on landscape well. It feels artificial. I am sure HP could do much much better... pity as it feels very expensive and is hardly better than copy cat free versions.

Perfect and irreplaceable. Wonderful App - the real thing, other than HP's old tactile feedback! Please update to conform with upcoming IOS.

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HP 12C app. I have on my I phone but it will not go to financial view when I rotate my phone.. I just purchased again for my wife’s phone got it downloaded and I still have the same problem. You said you had fixed this app a year ago but apparently not.. I have now paid for two applications that do not work... Not very good advertising!!!!

Sound. The clicking sound is very irritating and will prevent me from using this in a business setting. Please launch an update to fix this!

What’s 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.

Wanted to give 5 BUT. I have used the 12c for 25 years so naturally want this app to be my primary calculator. Unfortunately the app doesn't always rotate to landscape and the clicking sound is very VERY annoying. On the plus side it solves some equations faster than the real calculator which is impressive.

Good app, but is it still supported?. I like the app, but keep getting warnings from Apple that it needs to be updated and won't be supported by the next IOS update

Will not work!. I cannot get it to landscape so I can calculate monthly payments. I can be used as a regular calculator but not with all the functions. I have tried all the settings (the landscape is not lock) and it still doesn’t work. Don’t waste your money!!!

Thanks for the iOS 11 update!!. Love this app. I have the real HP12c calculator. It is nice to be able to carry this around with you all the time.

Purchased?. Bought this app a year ago but it didn't show up in purchased apps when I switched phones, like all the other apps. No contact for such a problem, so they get a one star. Unfair? So is having to pay for this application again.

Amazing app. Great job from HP. I wish they would do the same for scientific calculator like hp41 or hp11 we all love. This is now my default calc on my iPhone.

There’s a flicker at the bottom of the screen when I open it. Also when rotated it needs more of a margin because the iPhone swipe controls covers up some of the buttons

Please update!. Works just like my 12c. I like the portrait mode, which why I chose this rather than the '12c' lookalike. Update! Please update this app so that it will be compatible with future versions of iOS. I prefer this app to the knock off versions out there.

Not 64 bit compatible. I felt compelled to replace an old 12C-like app that kept showing a warning message that it is a 32 bit app, etc. Apple is sending out these warnings. I paid 3x more for HP's version only to find I have the same 32 bit issues. How can HP not be updating this app--especially at this price? I would steer clear of this app until resolved.

Perfect. I'm a big 12c user from way back. This app is perfect for me and I really appreciate the included help. If you are a hard core finance person you need this app

If it doesn’t rotate to landscape mode. Check to see if you phone screen is in locked rotation. Mine was. App works perfectly if you unlock rotation in the control panel.

Rotation not working. After last update screen rotation for classic look not working on iPhone pro max 12

Fix key clicks!!. Fix the key clicks. I've got them turned off in Settings but I still want a click with an adjustable sound level separate from the master ring volume. Do that and the rating is a 5.

Use landscape for fin fns. If you turn the iPhone to landscape mode you'll find it's not truncated and all the extra fin functions show up...just like in the photos.

HP 12C. I just downloaded (August 2018) the HP 12C App on my iPhone and I don’t have access to the full screen and functionality. I didn’t realize I had my screen on lock mode. All is good.

HP 12C 64 bit. Updated to x64 and works like a charm!!!! Thank you SO much!!!! Any updates for iOS 11, with 64 bit architecture? Resolved!!!

Out of date on iOS. Calculator is still working for what I need it for, but every launch displays a message that the app needs to be updated for newer versions of iOS. If something isn't done soon, app will probably get pulled from the store. Don't buy it until that is addressed.

Haptic feedback for key presses?. How about offering an option for haptic feedback when keys are pressed that mimics the feedback on the original calculator?

No Slideover or Split-Screen = Terrible. Digitizing 30 year-old algos scores 3 stars because a middle-schooler could have done that; unless you innovate from there 3 is the best this thing should get. From there I give harsh deductions for lack of slide-over and split-screen capabilities that would allow some actual work with it. Swipe-left backspace like Apple native calculator? Nope. Same middle-schooler could’ve done all these things.

New iOS. The latest version iOS blocks the full screen of this app, hope that it will be fixed soon

Yes! Updated for iOS 11 64 bit. I was concerned the app would fail when iOS 11 stopped supporting 32 bit apps but today the app upgraded to 64 bit!!!!! Also the click is softer!!!! It is a much better experience now!!! I'm looking be my HP12-C and this app keeps the next best thing handy! Don't forget to use it landscape to get the full calculator. In portrait it becomes a simple interface. Great job devs!!!!

Outdated and no updates. If you are using a reasonably modern iPhone, which has no “home” button anymore, then the only way to switch apps is to power down your iPhone. It insists on going into full screen mode and never relinquishes the screen. Outdated, outdated, outdated. This is an orphaned app.

Useless sound effects (or defects). Please fix the sound! It is annoying and useless. The real 12C does not have sound, so WHY the app will "click" on every key pressed? Just plain foolish, useless, nonsense.

Need RPN?. This is the ticket. I sometimes think RPN is particular to lefties. No learning curve unless you are right minded (pun intended). I started with an HP41C back in the eighties. OK, I will admit it - the logic used in the operation of "normal" calculators drives me crazy. Thank you HP for providing the 12C for the iPad. Lots of Fish

Recently updated for iOS 11. The app was updated recently. It is now fully supported and reliable.

PERFECT!. I've used HP calculators beginning in college and throughout my entire career - 36 years. This app is all I could hope for.

Not work ios11. This does not work under ios11 Update. Now works in ios11. Now back to the best financial calculator ever. What took so long?

Please update for 64-bit. Dear HP, I'll get really angry with you for paying for this app and not having an update for 64-bit iOS versions. It won't be the first time you let me down with your products' lack of support. Please keep your brand image intact - with such a small task to accomplish. Thank you.

New HP 12C app is TERRIBLE!!!. I LOVED the amazing non-official 12c app I had and lived for years. Now that app has disappeared mysteriously from my phone and I just spent $15 to buy the official one from HP. Unbelievable how lame it is. HP should be embarrassed. This is indicative of crappy thinking and lame products at HP. Why they are going down the tubes as a company. So so lame.

Nearest to the real thing. This app is the closest thing to the real HP12C. My only complaint is the goofy key click sound. The key clicks can be turned off, but I would prefer to have some audible feed back.

Please update. I got an iOS notification that the app won't work soon unless it's updated.

So your customers don't matter?. Are you updating so we can continue using or are you refunding our money??? Would someone at least give us an answer so we can continue using this app or when we can expect our refund.

Doesn"t work!. I bought this version to replace my previous one which did not go into landscape mode when I upgraded to iPhone-6. This one does't work either even though landscape settings are enabled! Very dissapointed with HP. Don't waste your money on this junk!

Not worth a dime. Ive downloaded many apps... Many of them were less than I expected..a few were awful... And THIS is my first time writing a negative review. This app totally over represents it's capabilities and returns crashes and errors. Pease fix or refund.

Update Missing (4" screen and click sound). I love the original HP 12C. The app is good. I just don't like the clicking sound!!! And, please, update it for IPhone 5!!!! It's a shame do not use full screen!

Please update the app so it continues to run.. I have several HP 12C calculators and also use it on my iPhone. Please update this app as Apple is telling me it is going to stop working in the next few minutes months.

Sad This App No Longer Works. I’ve used this app for years, and never had any problems. Recently I noticed that it would not convert to a traditional HP 12 C on the horizontal. I deleted the app and reinstalled but that doesn’t solve the problem. At this point it’s only a calculator without the full features of an HP 12 C.

App is working on the latest iOS. I got warnings from iOS that app may not work with the latest iOS, but it works, so I’ve updated my star rating to five)))

Screen rotation still a problem!. Thank you for fixing the screen rotation so that it now works as a financial calculator!

Works great!. Those who are reporting that the full functionality is not there either don't know how to read a manual or are shills for other apps. Works great and I use it all the time.

Works great! Just use landscape view. Works just like my 12c. Just use landscape mode. Price is steep, but it's a good backup if I don't have my calculator with me.

Rotate screen doesn’t work. Although they say they fixed this two years ago. I still can’t rotate the screen so half the functionality is useless. I reinstalled the app but still didn’t work. On top of that, good luck trying to reach the developers to report.

BUg Cant get it to flip back when looking at the bac. Phone: iPhone XR repro 1. Open app 2. Touch the hp12c logo Calculator flips around to a handy guide 3. Try to touch the word flip to go back to the calculator Expected results: the calculator shows the keys again Actual result: nothing. You have to kill the app and reopen to get back to the keys I suspect the button labeled “flip” is too far in the corner on an iPhone XR

Please update!. I purchased my beloved HP-12C in 1983 and it still works like a charm. Love the iPhone app and thanks so much for the 64-bit update!

Great so far. Only issue I have run across is that the display is not positioned correctly in portrait mode. The display sits too high on the graphics for the iPad Mini 2021 version.

Very convenient but needs update. Apple is warning that the iOS version of 12C needs an update to be usable with future OS upgrades. It's a superb app as it stands; here's hoping HP will continue to support it!

64-bit support. When will the HP 12C app be updated to a 64-bit application? Apple has indicated that support for 32-bit programs will end soon--probably with the release of iOS11! I paid a lot of money for an application I use everyday. I don't want to see those dollars wasted because HP will not make the app 64-bit!