12Calc

12Calc

by Ernest Brock

821 ratings
188 reviews
#110 in paid Finance
💼 Business
💰 Finance
$8.99

Details

  • Released
  • Updated
  • December 19, 2013
  • September 1, 2025

Features

12Calc screenshot #1 for iPhone
12Calc screenshot #2 for iPhone
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12Calc screenshot #4 for iPhone
12Calc screenshot #5 for iPhone
iphone
ipad
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About

This app provides a full-featured financial calculator experience, replicating the functionality of a popular physical model. It offers an audit tape for tracking calculations, a unit converter with currency exchange rates, and various worksheets with interactive graphs for financial analysis. Optimized for modern devices with high-resolution graphics and support for multiple orientations.

HP12C emulation
Audit tape for calculation history
Unit and currency converter
Interactive financial worksheets
Portrait and landscape views
Contextual help and tutorials
HD graphics with color themes
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What's New in 12Calc

3.0

September 1, 2025

•Fixed currency download •Fixed register save / restore

Charts

Top Paid

📉 110-3

Finance

This app dropped -3 positions in Finance chart.

Last updated on July 27, 2026.

User reviews

Best

Best of the best sir.

Melhor Calculadora

Excelente, melhor ate mesmo que a HP12C fisica.

Handy to have on my phone

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.

Better than the Real HP12C!

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.
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Like my HP12C, but better!

This app is the only calculator I use.

Developer apps

FAQ

What does 12Calc do?

12Calc is a comprehensive financial calculator app that emulates the functionality of the popular HP12C calculator. It allows users to perform complex financial calculations, track their work with an audit tape, convert units and currencies, and utilize various interactive financial worksheets.

What are the key features of 12Calc?

Key features include a full HP12C emulation, an audit tape to review and share calculations, a unit and currency converter with downloadable rates, and a suite of interactive worksheets for financial analysis such as loan amortization, depreciation, and cash flow. It also offers optimized HD graphics and support for multiple device orientations.

How much does 12Calc cost?

Based on the provided information, 12Calc is a paid application. There are no mentions of in-app purchases or advertisements, suggesting a one-time purchase for the full version of the app.

What devices is 12Calc compatible with?

12Calc is designed for iPhone and iPad devices. It runs in 64-bit mode on the latest iOS releases and is optimized for both standard and retina displays, offering high-resolution graphics and support for various viewing modes like slide over and split view on iPads.

What are common use cases for 12Calc?

Common use cases include performing loan amortization, calculating depreciation schedules, analyzing investments using Black-Scholes models, managing cash flow, and converting currencies for international transactions. It's also useful for students learning financial concepts and professionals needing quick, accurate calculations on the go.