HP 12C Platinum Calculator

• Price: $16.99

Last verified 31 Jul 2026

1.6 350 ratings · App Store

1. 1/5Embarrassing! 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.

   Education Technology Review · 31 Jul 2026

2. 5/5A Financial Classic, Flawlessly Recreated

   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.

   tommetrick · 31 Jul 2026

3. 5/5Works 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.

   Awesome Coffee App · 31 Jul 2026

4. 1/5Do not waste your time

   This specific developer has not been able to update this App to function within the last 4 years of iOS updates. Prior to that it worked great, just like my actual HP 12-c. During the last 5 years approximately I have reinstalled the updated versions and they ALL crash during financial calculations ALWAYS. Today I tried again and still crashes. Developer needs to take this App down or get it working. This is not a rare issue.

   NNTPaz · 31 Jul 2026

5. 5/5Updated version works great

   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)

   Mmarcott · 31 Jul 2026

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• 1.0
• 2.2.7

  Now supports iOS 11

• 2.3.3

  Bug Fixes

• 2.3.4

  Updated for new devices and for newer versions of iOS.

• 3.0.0 · 21 Jul 2026

  We’ve completely redesigned the HP 12c Platinum app to deliver a faster, cleaner, and more modern experience – while keeping everything you love about the classic calculator. New in this version: • Brand new user interface with a refreshed, modern look • Full-screen vertical layout (finally!) • Improved graphics and Retina-optimized visuals • Redesigned settings for better customization • Enhanced performance and compatibility with the latest iOS devices • Bug fixes and under-the-hood improvements for smoother operation Still the HP 12c Platinum you trust – now more powerful and easier to use than ever. We’d love your feedback! If you notice anything that could be improved, please let us know directly in the app or email us at [email protected].