The most reliable emulator for HP 12C Financial Calculator on iPhone and iPad, which behaves exactly like, and supports all the functions of HP 12C Financial Calculator.

5 Stars: "Works like the original but more handy" -Jen, CFA, MBA, Financial Analyst

5 Stars: "Best 12c out there. Nice to always have it with me." -Tim H. Nelson, Finance student

5 Stars: "Turns your iPhone into a 12c with helpful features, not in the original" -Hannah

5 Stars: "Retired my very experience HP several years ago and haven't looked back. Only use this app now." -Yan07

5 Stars: "I use it on a daily basis and no longer have to carry my financial calculator with me." -Debbie, Financial Advisor

5 Stars: "couldn't be a better app. Stable user-friendly and the exact replacement for my physical Hewlett Packard calculator." -Gatortag

This app uses the same RPN (Reverse Polish Notation) entry system and adds in big improvements for mobile to guarantee the best user experience and performance.

******** Highlight Features ********
• Time value of money TVM
• Cash flow analysis NPV, IRR
• Amortization
• Bonds
• Depreciation
• Loan payments calculation
• Statistical analysis
• Date arithmetic
• RPN entry
• Programmable
• Support auto-rotate and can be used in both orientations: landscape and portrait.
• In-app quick start help with one click access.
• Options to turn on/off audible key click feedback, and
• Switch between the US and Europe number format​/use comma as decimal point.
• Automatically save/restore all settings.
• In-app online support.
• Click menu key to see more settings.
• Long press to copy the calculation result to the clipboard and paste it anywhere.
• More ...

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What’s New

Version 2.544

Fix iPhone XR display issue in zoomed display mode.

Ratings and Reviews

4.0 out of 5
874 Ratings

874 Ratings

Shuttled CFI ,

Excellent 12C financial calculator

If you’re looking for or useful functional financial calculator with all the features of the traditional HP 12 C this is the calculator to invest in. I’ve been using a 12 C for decades from Hewlett-Packard. The original handheld calculator’s were high-quality superior products with innovative functions and quality workmanship. The latest versions are not likely to last very long physically and the workmanship and quality have become profoundly sad. I now want one device that works on my iPhone and iPad that I use throughout the day. The HP products are not supported with updates with the changing operating systems from Apple. They have annoying key clicks that you can’t silence without turning off all the sound on the iproducts, how pathetic is that. This is the calculator to buy! It’s supported with the latest operating system, there are no annoying key clicks you can’t turn-off, and the full functionality of the calculator is available no matter which way you turn your device to use it. The only complaint I have is the delay when you open the product because the developer runs an ad... but I am more than satisfied with the functionality of the product. Recommend you give it a try before wasting money on HP products that are no longer professionally supported.

LaurenFPeanutbutter ,

Lauren F.

I’ve GOT to use basically the HP 12-C calculator format. I used it in grad school and later in banking and bond rating careers. It’s bad to say but if it’s not “1” Enter “2”, I can’t get to three on a calculator anymore. They used to call it reverse Polish? polish? Notation.. no matter.. I need it.

I have a real HP 12-C at home but I’m not always at home or with a carry-all bag and this exact replica of the keyboard complete with the same functions.. including the % change key with the delta sign.. my fave.. well, I just love having it with me in my phone.

I’m doing a lot with photography now and it’s incredible helpful to have this very machine with me at all times. Love the “STO” functions (store) and then STO 1/Enter, “REC” (recall)2..(-minus) which gives you, without an equal sign (=), day your gross profit # on a run. So easy peasy. Love it..& you can store it without setting up a whole sheet. It’s great for personal numbers. LOVE IT!Many thx!

Henry Wallace Woodchuck ,

My all time favorite calculator!

This is a near perfect implementation of the HP 12C calculator, which I have been using since its inception. I have this app on my iPhone and on my iPad, and I have an actual 12C in two places in my home, so clearly this is my go to tool for anything financial. I really appreciate that the entire user's manual is included as it makes it very easy to refresh my memory on how some of the functions I don't use frequently work. And, I had to smile when the app was re-named to "RPN", because in brought back a memory of my then friend Donnie B., who was of Polish ancestry, explaining in great detail that the key sequence on the 12C was known as "Reverse Polish Notation". Congrats to the developers, this is a very well done app!


Vicinno Soft LLC
129.7 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Catalan, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Vietnamese

Age Rating


  • Family Sharing

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

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