# HiPER Scientific Calculator — user reviews > 52 indexed App Store user reviews of HiPER Scientific Calculator by Jindrich Houska, rated 4.70/5 from 243 ratings. - Source: https://appshunter.io/ios/app/hiper-scientific-calculator/id1645513530/reviews - App overview in markdown: https://appshunter.io/ios/app/hiper-scientific-calculator/id1645513530.md - Rating breakdown: 5★ 195 · 4★ 30 · 3★ 7 · 2★ 4 · 1★ 7 ## What do users think of HiPER Scientific Calculator? Overall sentiment: positive **Pros** - 👍 Excellent functionality for technical users - 💡 Custom functions for non-trivial calculations - 👍 Great expression screen, easy to navigate - 👍 Accurate and intuitive UI - 👍 Remains the best after years of use - 👍 Excellent HP calculator emulation - 👍 Super complete and functional - 👍 Most advanced calculator available - 👍 Feels like a real scientific calculator - 👍 Very useful for exams - 👍 Best calculator on App Store and Google Play - 👍 Well-designed and robust **Cons** - 🐛 Keyboard unresponsive at times - 🐛 Ads in paid version - 🐛 iOS version lacks RPN mode - 🐛 iOS version lacks themes - 🐛 iOS version lacks custom functions - 🐛 iOS version lacks variables - 🐛 iPad version locked to landscape - 🐛 No custom fonts or skins on iPad - 🐛 Paid upgrade offers after purchase - 🐛 Expensive for some users - 🐛 iOS version has unreadable white text on dark background - 🐛 Android button feedback missing on iOS - 🐛 iOS buttons look more stripped back than Android **Commonly reported bugs** - Keyboard unresponsive in multiple occasions - App freezes when entering numbers - Failed upgrade workflow message - App offers paid upgrade after purchase - White text unreadable on dark background in iOS settings **Most requested features** - Allow custom infix operations - Add widget support - Add RPN mode to iOS version - Add themes to iOS version - Add custom functions to iOS version - Add more variables to iOS version - Support vertical view on iPad - Add custom fonts and skins - Add portrait layout for iPad - Add dedicated ENG mode button - Add dark mode and themes to iOS - Add button feedback on iOS - Add unit conversion feature to iOS - Improve statistical calculation interface - Allow subscription transfer between platforms ## Newest reviews (16 of 52) ### 5/5 — Chida *2025-10-04* La verdad apenas la estoy ocupando y me gusta no tengo mucho que decir sobre la app ### 5/5 — Only one thing missing *2025-08-08* WIDGET!! Can you please make a widget for ease **Developer response:** Hello, thank you for the idea! Can you please email us to ios@hiperlabs.eu and explain a bit more what buttons you'd need there? Cannot promise you we will implement it anytime soon, but would be great to add it to our feature planning. All the best! ### 5/5 — Congrats *2025-08-07* Excellent, your method and easy for used ### 5/5 — Great *2025-06-26, version 11.1.0* Great calculator, have used for years. It is difficult to divide by a negative number as it treats this as a deduct symbol, rather than a negative. Instead you have to use fractions, which is a bit slower. ### 5/5 — Great app *2025-05-26* Love the app. ### 5/5 — Only one thing missing *2025-04-09, version 11.1.0* WIDGET!! ### 5/5 — Great HP Calculator Emulation *2025-03-13* I have several HP calculators and this emulation is excellent, and accurate. Operates just like original HP calculators, includes Reverse Polish Notation, Expressions, and complete repertoire of scientific functions. It is my go to when I do not have my original HP calculator handy. Highly recommend this app. ### 5/5 — Only one thing missing *2025-03-11* Great product so great I wish there was a widget for it. ### 5/5 — Excellent app *2025-02-21* This is super complete, functional and makes a lot extra things. I love this app. It is an excellent app. Make grow and keep all those features. Thanks. ### 5/5 — Best calculator app *2025-02-15, version 10.5.5* Hands down the most advanced calculator out there. So well programmed! Whether you’re a student, professional, or someone who just needs a reliable tool for quick calculations. ### 4/5 — Great App but Unresponsive *2025-02-12* I love this app however it’s a bit of bummer that it doesn’t support vertical view on iPad , the app is locked to horizontal position only I hope it gets fixed soon. ### 5/5 — Best Calculator *2025-01-08, version 10.5.5* I'm using it on my android for years. Now, I've downloaded it on my iPad also. Thanks to the developer! ### 4/5 — iPhone vs Android *2024-12-23, version 10.5.5* I miss not having the themes in the iPhone version. ### 4/5 — Good app, but missing some features *2024-12-02, version 10.5.5* The iOS version is lacking in features. I hope to see some of the features that the android version has in the future, especially themes 😺👍 ### 4/5 — Moved from Android *2024-11-21, version 10.5.5* This the first app I load. I am looking forward for the Android features getting ported. Thank for the great app ### 5/5 — Like a real scientific calculator *2024-10-11, version 10.5.2* Feels just like a separate calculator and works really well. Much better than that joke of a calculator, that comes preinstalled. ## Most critical reviews (10 lowest-rated) ### 1/5 — Teclado no responde *2025-11-14* Teclado no responde en varias ocasiones Es mi app de preferencia para cálculos sin embargo a partir de esta semana de repente al ingresar número en teclado se traba y no responde nada de la app y tengo que salir y volver a entrar pero por alguna razón está fallando incluso después de reinstalar tomándola nuevamente de la App Store No se que pasa 😔 **Developer response:** Hola, disculpa por este problema :-( Ocurría cuando se pulsaban dos teclas rápidamente una tras otra. Hemos solucionado el problema y hemos lanzado la corrección en la versión 11.2.4. Por favor, actualiza. ### 1/5 — Why ads in the paid version? *2025-05-31* Why ads on the paid version? This is not a honest business. **Developer response:** Hello, really sorry that you have problems :-( Indeed, ads are not supposed to be in the paid version. If you see them, please choose [MENU] and there "Restore purchase" - that should renew the information that you have paid. If the problem persists, please contact us via email to ios@hiperlabs.eu, and we'll investigate what's happening in your case. All the best! ### 2/5 — Great App on Android *2024-01-05* A great app on Android with RPN , Conversions , and the constants. I used the paid version constantly for it’s simple layout and customization. On IOS it lacks these things which need to be added. In particular it will sit in an unused and unpaid group until I can replace the cluttered RPN calculator I am using now with the RPN Mode. Still I would pay if I at least knew the RPN mode was in development and would be released soon. **Developer response:** Hello, thank you for your review! We have tried to enable the RPN mode previously, but we have hit some technical trouble that we need to sort out first. Based on your info, we have increased the priority of RPN mode in our planning, but cannot give you an estimation yet. Hope this helps! ### 3/5 — Great App on Android *2025-07-24* A great app on Android with RPN , Conversions , and the constants. I used the paid version constantly for it’s simple layout and customization. On IOS it lacks these things which need to be added. In particular it will sit in an unused and unpaid group until I can replace the cluttered RPN calculator I am using now with the RPN Mode. Still I would pay if I at least knew the RPN mode was in development and would be released soon. Upgraded one star for the developer’s response that at least they are working on the RPN mode. Still waiting on the rpn mode!!! **Developer response:** Hello, thank you for your review! We have finally finished the implementation of the RPN mode and released it in version 11.3.1, please upgrade. Apologies it took so long, we were facing various unexpected problems. The Conversions and Constants are available these days too :-) All the best! ### 3/5 — No custom fonts and no skins *2024-05-28, version 10.5.2* The iPad version doesn't have the cool Casio-like skins that the Android version have. Both versions though don't have the choice of display fonts like matrix dotnor LCD. Other similar apps do have font choices. ### 3/5 — How to switch to RPN on iOS version? *2024-01-18, version 10.3.0* I have been using the pro version on Android and am using it in RPN mode. The setting does not appear to be available in the iOS version? Please help. I have purchased permanent pro ### 3/5 — Great App on Android *2024-01-10, version 10.3.0* A great app on Android with RPN , Conversions , and the constants. I used the paid version constantly for it’s simple layout and customization. On IOS it lacks these things which need to be added. In particular it will sit in an unused and unpaid group until I can replace the cluttered RPN calculator I am using now with the RPN Mode. Still I would pay if I at least knew the RPN mode was in development and would be released soon. Upgraded one star for the developer’s response that at least they are working on the RPN mode. ### 3/5 — Question *2023-05-23* I like this but it’s rather expensive. Also on my physical calculators when I hit the ENG mode I get numbers with exponents as a factor of 3. Ex, 5mm would be 5 EE-3. Now I would like a dedicated ENG button that when I press would give me 5000 EE-6 or in reverse 0.005 EE0. That would be a nice addition **Developer response:** Hello, thank you for your review! The shifting of exponent is now available in version 10.4.2 (and later), because the [More...] button has been enabled on iOS. Just hit it, and use the appropriate buttons to shift the decimal point. If you have any further questions, best to contact us via email at ios@hiperlabs.eu. Hope this helps! ### 3/5 — App review *2023-03-22* Quite decent, but the UI needs improvements and some features are either not accessible or not available. Otherwise, it’s quite precise and fast. **Developer response:** Hello, thank you very much for your review! Indeed, we work on bringing all the Android features to iOS, so that will be fixed over time. But you also say that UI needs improvements - can you email us the details to ios@hiperlabs.eu? Would like to understand what exactly should we improve there, as we are not aware of any particular problems in the UI at the moment. Thank you in advance for your help! ### 4/5 — Good but Android version better *2025-04-14* On moving to iPhone I was happy to see HiPER Calc on the App Store. The experience is almost identical except the iPhone version lacks RPN mode. Why is that? **Developer response:** Hello, thank you for your review. Unfortunately we were facing various unexpected problems with RPN and couldn't release it earlier, but now it is all sorted out, and RPN is available in version 11.3.1. Please upgrade and enjoy! ## Most praised reviews (10 highest-rated) ### 5/5 — Excellent Calculator App *2026-06-01* I’ve been using the pro version for years, on both Android and iOS. As an engineer I find it’s the perfect blend of functions for most technical users without being overloaded with niche functionality. If the built in calculator app isn’t cutting it for you, try HiPer calculator. ### 5/5 — Super calculator *2026-04-30* Very good calculator. I am using it for last 5 years. It is user friendly and has a number of features for solving easy to complex calculations. I had purchased it for Android phone but recently I switched to iPhone but unfortunately I am not allowed to use that purchase. ### 5/5 — Customization! *2026-04-08* With the custom functions options this has become my goto calculator for non trivial calculations. Would love the option to expand on that by allowing custom infix operations! ### 5/5 — Excellent *2026-02-26, version 11.2.4* Everything I need for anytime with maths. ### 5/5 — From a calculator geek *2026-02-20, version 11.2.4* This calculator is just totally awesome. I have been a geek about calculators since I got my very first Mickey Mouse Calculator back in 1972 when I was seven years old. I’ve tried them all every Texas instrument version every RPN HP version, every cashier version you name it. But this one I love because it has a great expression screen to help is easy to navigate. You don’t have large books to read through. They’ve done a fantasy job with this calculator. I paid for the premium version and I couldn’t be happier. ### 5/5 — 100% recomendaciones *2026-02-04* 100% recomendaciones ### 5/5 — Terrific *2026-02-03* Accurate. Intuitive UI ### 5/5 — Perfect app *2026-01-27* Thank you ### 5/5 — Still the best *2025-11-30* I’ve tried tens of calculators on both the Google App Store and the Apple App Store. This calculator remains the best. I’ve been using it for many years now, and strayed from it to use a few others, but I keep coming back to this one. ### 5/5 — Feeling *2025-11-25, version 11.2.1* While the app icon is ugly, the app itself is so good that I forget my phone is not a calculator --- *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 2026-08-25.*