The Platinum version of the industry-standard HP 12c Financial Calculator adds the choice of time-saving RPN or traditional algebraic data entry as well as convenient editing features such as “backspace” and “undo” keys. Built with the same algorithms and calculation sequences you trust for real estate, banking, and finance functions every day. When you find yourself without your calculator, relax – just open it on your iPhone or iPod touch.

-Developed by HP, the original inventor of the HP 12c Financial Calculator series
-Identical layout, functions and answers millions rely on
-Quickly calculate loan payments, TVM, NPV, IRR, cashflows, bonds and more
-Horizontal mode shows full calculator and vertical mode provides a simplified basic RPN or algebraic calculator plus tip calculation feature
-In horizontal mode, click on the HP logo to show the back of the original calculator with quick references to common calculations
-Keep the power of your HP 12c Platinum handy on your iPhone or iPod Touch

What’s New

Version 2.3.3

Bug Fixes

Ratings and Reviews

2.3 out of 5
41 Ratings

41 Ratings

blackathol ,

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????

iPalpatine ,

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.

aauw ,

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...


HP Inc.
24.7 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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