MORAVIA Consulting, Spol. S R.o.HP 15c Calculator Customer Service
- HP 15c Calculator Customer Service
- HP 15c Calculator App Comments & Reviews (2026)
- HP 15c Calculator iPhone Images
Meet the next generation of your favorite scientific calculator. The official HP 15c app, now brings a completely redesigned interface, a modern look, and improved functionality—while preserving the precision and reliability trusted by professionals for decades.
This RPN calculator offers the features, algorithms and calculation sequences of the original 15c Scientific Calculator conveniently stored on your iPhone or iPad.
The HP 15c You Know – Now Better Than Ever
• Official emulator of legendary calculator device by HP
• Identical algorithms, layout, and keystrokes as the original HP 15c
• RPN (Reverse Polish Notation) for fast and efficient input
• Matrix calculations, Complex functions, Numerical integration.
• Ideal for math and engineering students and professionals
• Programmable – up to 448 lines
Be Ready. Anywhere. Anytime.
Whether you’re in class, at the office, or on the go, HP 15c is ready when you are. Just launch the app on your iPhone and get to work.
Download HP 15c today and experience the perfect blend of classic functionality and modern design.
HP 15c Calculator App Comments & Reviews
HP 15c Calculator Positive Reviews
Amazing updates!!I’ve used HP 15c for many years because I missed my faithful college companion, and it’s nostalgic and fabulously functional. But the advances in the latest updates are nothing short of amazing. Addition of functionality in the portrait view is top notch…thank you!!! I have a lot more to explore if the What’s New list is accurate, but immediate reaction is 👍🏽 🥰!!!.Version: 3.0.0
Nice emulator - missing one featureThis is my favorite calculator ever so I can’t give it anything but five stars. There is another (unofficial) 15C emulator that disables the home bar unless you swipe it twice. This avoids accidentally swiping the home bar instead of pressing a button on the bottom like “0” or “.” That small addition would make this perfect..Version: 3.0.0
As good as the originalI grew up using HP RPN calculators through high school and college. Regular calcs have never felt right after that. Very happy to have found this app. Works just like the originals. Very pleased with the latest update that adds a vertical layout now. Almost feel like I have my old 41CX in my hand again..Version: 3.0.0
Love the portrait lookWork flawlessly, all functions well done. For older hands the portrait look is quite useful. A physical model with 2 line display like the hp-35s will be hit at least with me. Saving calculator state and program will be a veritable upgrade..Version: 3.0.2
Just awesome!I love this app, brings back my early days at Purdue. I still have my original HP 15C and still works! Love the new look so I don’t need to rotate my phone to see the rest of the keys. Thanks so much for updating the app and continuing to support this vintage calculator!!.Version: 3.0.0
As great in 2025 as in 1985I still have my 15c from the 80s and still use it. So I was thrilled when the 15c app was originally released for the iPhone. I'm so happy to see the latest update and know that it has not been abandoned..Version: 3.0.1
Best calculator everWhen my HP 15C died many years ago, I replaced it with a newer HP model - which I never liked as much as my old 15C. I’ve been very happy with this app ever since I found it years ago. I use it both on my phone and iPad..Version: 3.0.1
64 bit HP 15C!!Thank goodness it’s here! The app is awesome. The original calculator is the awesome progenitor (I still have it from the early eighties and I love it: it continues to work.) It is the best scientific hand calculator ever made and the app is true to the originals functionality and works great on the iPhone!.Version: 3.0.0
A joy to useThe HP 15c Calculator App is my go-to calculator on my iPhone. I never had an HP calculator when I was in school but a few of my friends did. Using this app is a joy. The input notation requires fewer button-presses to get a result than conventional calculators..Version: 3.0.0
Love the portrait viewThe new portrait view is great! I like the classic 15C but the new portrait view allows me to use all the functionality without having to switch my phone to landscape mode..Version: 3.0.0
Superb Scientific RPN CalculatorI’ve had HP15c calculators since the mid-1980s, and until I had a smartphone to carry around, always had one in my everyday carry. Now that this beautiful emulator exists, I have the best of both worlds. Thanks!!.Version: 3.0.2
Need an update for iOS 13I love this app but the latest update messed up the number display on the iPhone 11. Hopefully fixed soon. 5 stars when fixed!.Version: 3.0.1
To use on iOS 12, delete & ReinstallUpdated to iOS 12 and it stopped working. I deleted it and powered down iPhone. Restarted and re-installed and it works again..Version: 3.0.2
Second best 15c calculatorOther implementations are half of the price and function better. The vibration feedback way too long. The App is still not sized for the full iPhone 5, 5s, or 5c display. C'mon HP be the best out there or bow out.... This looks bad..Version: 3.0.1
I love the update!Regardless of the reviews not liking the layout, I love it! You can still opt for the previous layout and the landscape option is still there too. Good job!.Version: 3.0.1
HP 15cI have had a HP 15 C since the early 1980s (1983 I think). This emulator works just like my original HP 15 which I still have.. But this way I don’t have to expose my heirloom calculator to getting dinged up..Version: 3.0.1
Display numbers are too highFor some reason, the numbers in the display are way up high compared to where they used to be, I think, and I think they could be moved down very easily..Version: 3.0.0
Amazing updateLove the new update! The vertical layout in particular! This has been my main calculator app for a while and it only got better!.Version: 3.0.0
As good as the real thingBeen using my HP15c since early eighties. Still have it. This iPhone application is an exact representation of my original HP15c. Great application. Highly recommended..Version: 3.0.0
An old friendI have used HP Calculators through out my engineering life. This app duplicates the HP 15 calculator, that I still use, perfectly. If you have used HPs in the past you will love this app..Version: 3.0.0
Great AppI love this app. It replicates the HP 15 c in detail. It’s hard to beat. I use it for almost all my calculations. I wish the 15 C had an easy way to add vectors in coordinates. That’s the only thing that sticks in my mind..Version: 3.0.0
Brilliant appI use scientific calculations all day, and this app is silky magnificent. It has been worth the price many ties over, and I would hate to be without it. Fantastic!.Version: 3.0.2
Brings back great memories of triumphing over calculus and differential equations… a slide ruleA meticulously rendered 15c in all of its glory. I still have my original but use it gently, keeping it like my grandfather’s abacus -a relic..Version: 3.0.0
Works just like my real HP 15!They finally fixed the decimal setting so it doesn’t always go back to the four digit default..Version: 3.0.0
My go-to calculator!Once you learn to use RPN all other calculators just feel wrong. This is a great app, and the update is truly an improvement..Version: 3.0.0
Great HP 15C AppI’ve used this app for several years-as well as the actual calculator for decades-and I really like the new version. I highly recommend it..Version: 3.0.0
I love this AppThis is a great app for those of us who grew up with our 15c’s. Now I can take it wherever I go. I still have the original too..Version: 3.0.0
Just like the original 15CIf you are a legacy HP15 user, this is a must have app for iPhone and iPad. Fully functional and programable including complex arithmetic and matrix operations..Version: 3.0.0
Update is not displaying correctlySept 2017 Update is not displaying correctly. Worked fine before update. I am a "uge" fan. Please fix dis dang gone app!!!.Version: 3.0.0
Best calculator everThis is the exact duplicate of the 15C I used in college during the 70’s. Once you learn the reasoning behind a hp you can’t go back to a regular calculator.Version: 3.0.0
AwesomeThank you for this. I have used these for decades. Having on phone is a wish come true..Version: 3.0.0
The bestIf you were in engineering school in the 80s and had an original, this is an absolute must have!.Version: 3.0.0
Original 15cI still have my 15c i bought for $85 usd in 1982 for chemistry class in college:) & love this new update for the mobile app!.Version: 3.0.0
Classic programable calculatorI still have the hardware version and am pleased to see this software version so accurately rendered..Version: 3.0.2
Better than the originalI have the “real” one and this is better! I love it!.Version: 3.0.0
The best Hp 15c calculator.I'm a retired HP engineer and I still have a working 15C calculator. This emulator is the best there is. The new update greatly improved portrait mode. Thank you!.Version: 3.0.0
RPN RulesI love the RPN input system. I have this original calculator and this “app” will always be on my phone and tablet..Version: 3.0.2
Looks and feels like the real thingAnd works like the real thing too..Version: 3.0.0
Fantastic!Fantastic fresh, modern look, you guys did VERY well with this release, thank you!.Version: 3.0.0
Great ProductWas pleased to find this app years ago and the ongoing updates…. thanks, Bob.Version: 3.0.0
F & g keysGreat app. One of my GOTO’s. Minor glitch? If either the f or g key is pressed in error, pressing either again does not deselect it. Keep up the good work..Version: 3.0.0
Landscape Mode …Not as good as previous version. Please extend the graphics to the edge (when Full Screen is set to off).Version: 3.0.0
Luv itThis calculator got me through college and this app does an awesome job of bringing it to modern devices - Love the update!.Version: 3.0.2
Beautiful UpdateGreat update this feels just like the HP 15c I use to have only better!.Version: 3.0.0
RPN at its best!The latest update for this calculator is awesome!!! Was great before but now even better!!!.Version: 3.0.0
Excellent Post-Fix Notation (RPN) Calculator.HP designed for hand-held programming. Ideal for STEM-bound students and Professionals. Includes most common mathematical functions and constants..Version: 3.0.1
HP 15CIdentical to the physical HP 15C. Haven’t tried programming functions but everything else is as good as the real thing..Version: 3.0.0
AmazingWith the edition of the full vertical screen, this app is just about perfect..Version: 3.0.0
New Update is fantastic!The new update is fantastic, showing all the keys on the portrait mode. That was a big inconvenience in the previous portrait version where you couldn’t press the other keys unless you rotated the phone to landscape orientation. I also love the ability to copy the calculation result to the clipboard. That is a important feature that was missing in the past. I also like the option for the key input to be when you release the key and not when you press the key. This allows, in case you touch the wrong key, to just slide your finger away and when you release, it doesn’t perform the function - that is great. Very well done and much appreciated. This is a significant update..Version: 3.0.0
Best app everHP15c is the calculator that I used when I was in engineering school and this app does and excellent job of emulating that device! I have used many apps over the years and, by far, this one is the best one I’ve ever paid for..Version: 3.0.2
Love itMy faithful engineering companion, built into my phone.Version: 3.0.0
A classicA terrific app. It has the feel of the calculator that I used throughout my engineering career..Version: 3.0.0
For those who want to do REAL mathTHIS is the app you need!.Version: 3.0.0
Great appGreat SIM of the HP 15C.Version: 3.0.0
Another Retired Old UserHas worked great through numerous versions of iOS now 15.1. Would love an upgrade to enable cutting and pasting for entering and saving numbers. Still have my old HP, used it with a pencil and paper. Now it would be better to cut and paste numbers to and from other programs. It’s a great calculator, could be better..Version: 2.3.4
Best Calculator everIve been using the 15C since the early ‘80’s. This app has been a welcomed addition. RPN is a habit and once mastered, you can’t use a normal calculator. Thanks for this app. Been using it for years now.Version: 2.3.2
64-bit SupportFinally added 64-bit support the day after iOS 11 came out! Thank you..Version: 2.1.2
Free International Money Transfer 💸Enjoy high maximum transfers into more than 20 currencies while saving up to 90% over local banks! The cheap, fast way to send money abroad. Free transfer up to 500 USD!Version: 3.0.2
