Meet the next generation of your favorite financial calculator. The official HP 12c app, now brings a completely redesigned interface, a modern look, and improved functionality—while preserving the precision and reliability trusted by professionals for decades.
Built for everyday use in business, banking, real estate, and education, the new HP 12c brings a timeless classic into the modern era.
The HP 12c You Know – Now Better Than Ever
• Official emulator of legendary calculator device by Hewlett-Packard
• Identical algorithms, layout, and keystrokes as the original HP 12c
• RPN (Reverse Polish Notation) for fast and efficient input
• Built-in financial tools: loan payments, TVM, NPV, IRR, cash flows, bonds, and more
Be Ready. Anywhere. Anytime.
Whether you’re in class, at the office, or on the go, HP 12c is ready when you are. Just launch the app on your iPhone and get to work.
Download HP 12c today and experience the perfect blend of classic functionality and modern design.
Update 4/30: Thank you for taking time to fix the iPad layout after the most recent update. I haven’t fully gone through the app (the only reason for 4 stars instead of 5), but this looks GREAT! Returned the usable layout, and still delivering improved graphics, etc. Love it!!! Thank you for being so responsive! …………………….. …………. From earlier in April 2025: I have loved using this app for 10 to 15 years on both my iPad and iPhone. I use the app a few dozen times per day… mostly on my iPad at my desk. Today’s update messed up the interface on the iPad… buttons look oddly spaced, etc. I hope that gets fixed soon!!!! Yesterday i would have given 4 stars. Today i give 2 stars. I acknowledge it looks like a lot of work was done and it looks crisper, but it no longer looks/feels like a 12c on an iPad.
Developer Response
Sorry for the trouble with the previous version. Yesterday, we released version 3.1.1, which addresses the key responsiveness and few other improvements. Could you please install it and let us know if everything is working correctly now?
User
RD2001A
I want to thank the developer for its acknowledging my problems with this application. I received an email directly from the developer informing me of a just-released 3.1.1 version which I immediately downloaded. It appears to solve all of the problems I note below.Update lost all my stored information. Commas are where periods should be and vis versa. Hate the full screen layout on an iPad! The update needs an update and in a hurry!I have installed Version 3.1, and neither the layout, which is almost unusable, nor the commas being where periods should be and vice versa have changed! How can this continue?NOW, in addition to the problems previously noted above, the App forgets all stored numbers within hours of entry! After almost 50 years of using the original HP 12 C hand calculator through various versions of this calculator for iPad I have never had anything like this. The App is effectively useless. In fact, I have never had an app of any kind purchased in the App Store that had a single significant issue, let alone so many issues that the App was useless!
Developer Response
Thanks for your review! 🙌 We’re thrilled that you’re enjoying the app. Would you consider to give the app more than 1 star if you really think it has fixed previous problems?
Great App, It Makes Me Feel Fancy
Captain SPACE
So since my senior level finance class in college I've been using my HP 10b when I don't have Excel available. I bought a real HP 12c recently, meaning sometime shortly after 1980, because it makes me look like Mr. Fancy Finance Guy. Having used algebraic calculators for over 100 years, I needed to practice RPN, so I got this app. Now I brag to all these 20 to 50 year old whippersnapper finance colleagues of mine about how I can use RPN and they can't because it confuses them since it's not the Excel IRR function or whatever the latest new Excel finance functions they've come up within the last 50 years are. They say RPN is faster than algebraic notation, but I like RPN simply because it's confusing and esoteric and being able to use it makes me better than everyone and I win. So there.I recommend this app.
Oh man, the 3.1.1 update was terrific
LanaiLizard
Very nice to have fixed many of the 3.0 problems like memory loss but to also bring back the classic portrait keyboard and then to give the user options to place the smaller keyboard high, middle and low on the screen was a very surprising and VERY thoughtful touch with the design.I actually prefer the old program's "photographic" landscape look for the keys and slightly thicker digit display look better, especially on the iPad, but that is a a small complaint. The V3+ updates are just outstanding! Having the full calculator keys in portrait mode on the iPhone is just brilliant. I'm not sure I realized that this rotation from landscape had enough keys in portrait mode to do that but it does.
Developer Response
Thanks for your review! 🙌 We’re thrilled that you’re enjoying the app.
Stability improvements and small fixes.
Version 3.1.2
The developer, MORAVIA Consulting, spol. s r.o., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
MORAVIA Consulting, spol. s r.o.
Size
41.9 MB
Category
Finance
Compatibility
Requires iOS 15.6 or later.
iPhone Requires iOS 15.6 or later.
iPad Requires iPadOS 15.6 or later.
iPod touch Requires iOS 15.6 or later.
Mac Requires macOS 12.5 or later and a Mac with Apple M1 chip or later.
