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 2.2.7

Now supports iOS 11

Ratings and Reviews

2.1 out of 5
130 Ratings

130 Ratings

Awesome Coffee App ,

Works great with iOS 11 (October 2017)

As of October 21, 2017 this app works great in iOS 11. Given that HP is now using a cheap low cost provider to make the new physical calculators out of Asia, this app is the only HP12c worth buying. The new physical calculators don’t register half the keys if you type fast. This app is great for iPhones and iPads. Make sure you get the platinum version in order to have the latest features such as backspace.

Education Technology Review ,

Embarrassing! Calculation errors!?

Hewlett Packard has a loyal following and a reputation for highest quality - and for correcting problems when they arise. (Early HP scientific calculators actually were recalled and replaced when a tiny bug was discovered.) But a business calculator that makes elementary-school math errors (e.g., in squaring a negative number) is unforgiveable!

The calculator on which this app is based goes back to 1981, and among financial wizards both old and young, it is still the gold (well, platinum) standard! This iPhone version appears to have been introduced in 2009, which should have allowed HP plenty of time to get it working credibly under OS 3.1 or later.



Six years ago I wrote a review and gave it one star because of some math inconsistencies that were also at odds with the way the real 12CP worked (I still have two of them). I had honestly forgotten about this review. I revisited the app and now give it 5 stars. It seems to now work like the hardware version in everything I checked. This is as good as it gets.


HP Inc.
23.6 MB

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



Age Rating
Rated 4+
© 2009 Hewlett-Packard Development Company, L.P.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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