Screenshots
Description
12Calc is a full version of the well known HP12C for the iPhone and iPad. It also includes an audit tape, unit converter, worksheets, rotated views, user guide and HD graphics optimized for iPad and iPhone retina displays. •Runs in 64 bit mode on the latest iOS release and new iPads and iPhones. •Calculations are highly accurate and blazing fast. No more "running" flashing displays for amortizations, depreciation schedules or interest calculations. Work as fast as you can type. •Audit Tape: The audit tape keeps a record of your calculations. You can review, mail, text, share or print the tape. •Unit Converter: Convert between a wide variety of common units and currencies. Currency rates can be downloaded from the internet. •Work Sheets with interactive graphs: Auto Purchase Black-Scholes Bond Break-even Cash Flow analysis Currency Date Depreciation Interest Conversion Lease Loan Amortization (includes option for Canadian mortgages) Margin&Markup Refinance Statistics Tip TVM •Views for all orientations: Portrait and landscape renderings of the full keyboard are provided for iPhone and iPad. The iPad version includes slide over and multiple split view displays as well as side-by-side display of the help page, audit tape, tvm mortgage table or program variables. •Built-in contextual help: Touch the ? key for a description of any keyboard function with examples of use. If you are just learning or can't remember how to use a function- just touch the ? key. Includes tutorials on how to use reverse Polish notation (RPN) and how to solve time value of money problems. •HD Graphics: Graphics optimized for both retina and standard resolution screens. Choose from multiple color schemes including gold, rose gold, brass, copper, silver and several color tints.
What's New
•Fixed currency download •Fixed register save / restore
Details
- Developer
- Ernest Brock
- Main Category
- Finance
- Version
- 3.0
- Version Release
- 2025-09-01
- Initial Release
- 2013-12-19
- Size
- 6 MB
- Age Rating
- 4+
- Price
- USD 8.99
- Languages
- EN
- Bundle ID
- com.ErnestBrock.12Calc
- Version Rating
- ★ 4.90 (905)
- First Seen
- 2026-05-31
Metadata updated 2026-06-16
Rank History
Free · Max 90 days · Top 5 categories shown (Y-axis: rank, lower is better)
No rank history data
Free Rankings
No rankings
Paid Rankings
Competitive Benchmark — Finance Top 10
What it takes to beat this app — comparison with the category's top apps. The orange row is the current app.
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| 8 | BA Financial Calculator (PRO) | USD 3.99 | ★ 4.85 | 447 | 1 | 2025-09-25 |
| 9 | Stock Market Predictor AI | USD 4.99 | ★ 0.00 | 0 | 1 | 2025-05-30 |
| 10 | StockSpy: Real-time Quotes | USD 9.99 | ★ 4.66 | 515 | 9 | 2026-04-03 |
| 61 | 12Calc | USD 8.99 | ★ 4.90 | 905 | 1 | 2025-09-01 |
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User Reviews
I have used an HP 12 C for nearly 35 years. Having it on my phone makes it very convenient. I find the software to work as well as my HP 12 C.
Trust me. This app is spectacular! I've used Hewlett Packard calculations since my early years in real estate in late 1970's. I didn't think it could be improved but I was wrong as this emulates all the good features of the physical HP12C and then adds benefits. It is so great to be able to look at the financial registers and see what values are in N, I, PV, PMT, and FV. One of my favorite features is using Clx to eliminate the last number in the X register. The physical HP12C eliminates the whole number so you have to start over. Being able to look at the tape is HUGE if you're wanting to see or verify that you have included all the variables in a long calculation. My fellow REALTORS® don't buy the Hewlett Packard iOS version. I used to train agents at board offices in Tennessee and Alabama on the use of the HP12-C and I've written articles for our nation trade publication, Real Estate Today. I've used the iOS version From Hewlett Packard and this version from Mr. Brock. This version wins HANDS DOWN. I would pay twice or even three times the asking price on 11/8/19. It's unfortunate that Ernest Brock has to battle against Apple's tweaks to it's operating systems which in turn causes tweaks in the App. This is THE go to app for financial calculations in the residential and commercial fields in real estate. To Mr. Brock: I am saving this review so that I can repost it due to an Apple reset.
This app is the only calculator I use.
I used a free hp12c app for years. Don't make the same mistake.
I own 4 12c’s and have used them since way back when they first came out. They now all sit in my desk drawer since I bought this app. It does everything a 12c does and more, plus it does it much faster. Thank you Ernie!
I have been using this app for many years and it has been accurate and dependable every single time!!
Great 12C
I love this calc.
I’ve been using a 12C in my real estate appraisal business for 30 years. This app is outstanding. Don’t hesitate to install it. It functions identically to the actual calculator only better.
The calculator is very efficient and useful for our daily business uses
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