# HP 12C Platinum Calculator — user reviews > 242 indexed App Store user reviews of HP 12C Platinum Calculator by MORAVIA Consulting, spol. s r.o., rated 1.60/5 from 350 ratings. - Source: https://appshunter.io/ios/app/hp-12c-platinum-calculator/id328224790/reviews - App overview in markdown: https://appshunter.io/ios/app/hp-12c-platinum-calculator/id328224790.md - Rating breakdown: 5★ 29 · 4★ 11 · 3★ 15 · 2★ 34 · 1★ 261 ## What do users think of HP 12C Platinum Calculator? Overall sentiment: negative **Pros** - 🚀 Accurate calculations - 🔒 Faithful emulation of physical HP 12C - 👍 Familiar and useful interface **Cons** - 🐛 Frequent crashes - 🐛 Calculation errors - 🐛 Compatibility issues with iOS updates - 🔋 Drains device battery **Commonly reported bugs** - App crashes when pressing CLX button - Errors in time value of money calculations - Incompatible with iOS 11 and later **Most requested features** - Update to support latest iOS versions - Optimization for larger iPhone/iPad screens - Option to disable annoying key click sounds ## Newest reviews (16 of 242) ### 4/5 — Wonderful *2026-07-21, version 3.0.0* Wonderful. It took a long time. ### 2/5 — App keeps closing *2025-10-13, version 2.3.4* It’s it works with basic math and calculations, but when I do a present value, cash flow calculation it freezes and exits the app ### 3/5 — Update please *2025-10-05, version 2.3.4* Please update the app and fix the bugs of crash. It’s a great app. ### 1/5 — Errors out *2025-06-16, version 2.3.4* Paid $14.99 for this and have to delete and reload the app every time I do a new calculation. Annoying. ### 2/5 — Please speed up the updates *2025-05-25* When I try to calculate the interest rate based on a deposit, knowing the final value and the period, the message “Error 5” appears. Both on the physical HP 12 Platinum and on the 12C Gold App, the result appears correctly, but on this App, the error appears. I confess that I was a little frustrated with the quality of the App, but I believe that, just as you did a great job on the 12C Gold App, you will also do a great update on this one. I honestly am hesitant to buy another app (I bought the one for the HP 12C Gold and the one for the HP 12C Platinum), because they don’t even respond to requests. ### 1/5 — Not Fullscreen *2025-05-18, version 2.3.4* Unlike the basic, less expensive, version, this has not been updated to full screen mode. Probably better to wait until upgraded or stick to basic version until / if this happens. ### 1/5 — Poor Development *2025-05-13, version 2.3.4* Crashes all the time. Unaddressed bugs. Bummer. ### 1/5 — Atualizacao 64 bits *2025-04-20* Ola HP, teremos atualização para utilização no Ios 11? Verifiquei que a Gold ja foi atualizada. Obrigado ### 1/5 — Horrible *2025-04-17, version 2.3.4* Constantly crashes. Always gets an error message when calculating monthly payment. Only works for simple math like additions, subtractions, multiplications, etc…. Just a basic calculator that comes free with most phones. Do not purchase!! ### 1/5 — Constant Crashes / ripoff *2025-04-12, version 2.3.4* This would be a very nice app to have if it actually worked. Genuinely we deserve refunds. I spent too much money for an app that crashes every time I hit the clear button. ### 1/5 — Não funciona e não tem atualizações para correções de bugs *2025-03-20* Dinheiro jogado fora ### 1/5 — Rip Off - Paid for App that No Longer Works *2025-02-09, version 2.3.4* This app is a ripoff. Paid app with no update support. These criminals should have to refund all their customers. ### 1/5 — Não funciona *2025-02-01* Trava e fecha o aplicativo em cálculos simples ### 1/5 — App com Bugs *2025-01-30* Pessimo! Ligo o app e ele desliga múltiplas vezes. ### 1/5 — Erro *2025-01-02* Fechando o app sozinha ### 1/5 — Bug *2024-12-25* Todas as vezes que utilizo a tecla “CLx” para corrigir um número digitado errado o APP encerra automaticamente. Só funciona ao utilizar a função “f”. Não oferece a possibilidade de alterar o uso de ponto por vírgula no sistema decimal. Péssimo APP que não deveria estar disponível na Apple Store. ## Most critical reviews (10 lowest-rated) ### 1/5 — App Should be Updated! *2025-12-30, version 2.3.4* Very disappointed after purchasing to discover the app has not been updated. Gold 12c update is fantastic! Please update this calculator too! ### 1/5 — What a shame *2025-12-28* Please stop being scammers and update the HP 12C Platinum app. It's been 4 years without an update and the calculator doesn't work! Resolve this immediately. ### 1/5 — Não roda mais *2025-11-15* Paguei pelo app e simplesmente não funciona mais. ### 1/5 — Refund Needed *2025-10-02, version 2.3.4* App hasn’t worked for years and crashes when launching. This calculator is legendary in the finance field and there is no excuse for years of these crashes. Either update the app or issue a refund for those of us who paid to get it. ### 1/5 — Crashes *2025-09-15, version 2.3.4* Won't compute. Crashes frequently. Just disappears off the screen and relaunching and rebooting your phone does not change its behavior. Do not buy. It has not been updated in four years, so clearly no one supports the app. ### 1/5 — Não tem atualização *2025-08-23* Comprei o app, sempre teve problema e nunca foi corrigido. Não há atualização. ### 1/5 — Parou de funcionar *2025-07-25* Início o programa e quando clico tecla CLX fecha o aplicativo ### 1/5 — Terrible reliability *2025-07-16, version 2.3.4* Have been using 12c’s all my career. Loved the unit. On an iPhone it’s a disaster. The clear button often erases the app altogether. ### 1/5 — Calculations are wrong. App crashes. *2025-06-20, version 2.3.4* 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. A recent review by one tommetrick says the app is not for entertainment and only for professionals. Of course it’s for professionals. Only they search for HP12C and buy it for $14.99. I am an MBA graduate using the calculator for 40 years now. That review by tommetrick is false and posted to discredit all other reviews which give the one star rating the app deserves. Don’t buy it till I post that it has stopped crashing. Press CLX and the app will crash proving itself that it is not worth it. Wish there was a zero rating for this app. ### 1/5 — Simple PMT calculations won’t work *2025-06-16, version 2.3.4* Terrible investment buying this app. I use it side by side with my calculator to make sure it wasn’t user error on my part and sure enough it is not. The app keeps returning error 5 on PMT calculations (making sure I have a negative number so as not to cause the error) but no matter what it returns the error 5. Terrible product. Don’t waste your money as I wish I hadn’t. ## Most praised reviews (10 highest-rated) ### 5/5 — Update fixes crashing! *2026-08-15, version 3.0.0* With this latest update they’ve fixed crashing errors. Will use this more now. Thank you. ### 5/5 — Improved…yay *2026-08-11, version 3.0.0* Much better…old version cancelled app on clx…This version works great! ### 5/5 — New update 2.0. SO MUCH BETTER. *2026-07-22, version 3.0.0* They finally fixed all the silly issues. ### 5/5 — A Financial Classic, Flawlessly Recreated *2025-05-21, version 2.3.4* The HP 12C Platinum is not just a calculator—it’s a trusted instrument of precision, relied upon by professionals across industries for over four decades. This app captures that legacy with care, accuracy, and respect. Its interface remains true to the original. No gimmicks. No distractions. Just the refined layout and reliable performance that made the 12C a standard in finance, banking, and business education worldwide. Some reviewers, perhaps unfamiliar with what they hold, have rated this app poorly. That is not a reflection of the product—but a misunderstanding of its purpose. The HP 12C is not meant to entertain. It is meant to perform. And it does so, brilliantly. To the developers: thank you for preserving the experience. To the users who know the value of this tool: let your five-star reviews speak louder than the noise. This is excellence, reissued. ### 5/5 — Great App *2022-02-07, version 2.3.4* 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. ### 5/5 — The Original! *2021-10-24* 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! ### 5/5 — Updated version works great *2021-07-07* 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) ### 5/5 — Smooth, Bug-free, Fast *2020-09-16* 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. ### 5/5 — Works great on iPADOS 13.4 *2020-03-29, version 2.3.3* 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. ### 5/5 — Version 2.3.3 doesn’t work at all for me. *2020-02-04, version 2.3.3* Was my go to calculator until this. Please get it working again (iOS 13.3.1) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-12.*