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App Store Apps > Finance > 12Calc
12Calc icon

12Calc

by Ernest Brock · Finance · $8.99
On the App Store since December 2013 · Data updated 2026-10-17
App Store

12Calc is made and published by Ernest Brock. AppBrain is an independent app data site and isn't affiliated with Ernest Brock. The app name, icon, screenshots and description belong to Ernest Brock and are shown as published on the App Store.

AppBrain's verdict

EstablishedLoved by users
Best rank
#29
Top Paid, Brazil
Rating on App Store
4.89
924 ratings
Last updated
September 1, 2025

Users love it: 4.9 stars from 924 ratings. Its best ranking is #29 in Top Paid, Finance in Brazil.

Rankings

App Store top charts
Highest rank
#29
Chart
Top Paid
Finance
Country
Brazil

App Store Rankings for 12Calc

Top rankings

Rank Country Category List
29 Brazil Finance Top Paid
91 United States Finance Top Paid
96 Iran Finance Top Paid

Ranking history in Brazil

Competitors

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Releases

Updates seen on the App Store
Version
3.0
Launched
December 2013

No changelog data

User feedback

Ratings and reviews on the App Store

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Technology

Found in the app by AppBrain
Price
$8.99
App size
5.60 MB
Content rating
Everyone

Technologies used by 12Calc

About the app and developer

About 12Calc

12Calc is a finance app developed by Ernest Brock.

What is the rating of 12Calc?

12Calc is rated 4.89 out of 5 stars, based on 920 ratings.

Is 12Calc free?

12Calc costs $8.99. The app size is 5.60 MB. The latest version available is 3.0. The last update was on September 1, 2025.

What are the requirements for 12Calc?

The app has a content rating of Everyone. The app has been available on the App Store since December 2013.

Developer information for Ernest Brock

Ernest Brock

Address:

Share 12Calc

Store listing

By Ernest Brock, from the App Store
12Calc Screenshot 1 of 5
12Calc Screenshot 2 of 5
12Calc Screenshot 3 of 5
12Calc Screenshot 4 of 5
12Calc Screenshot 5 of 5
Screenshots by Ernest Brock, from the the App Store listing
Description by Ernest Brock Written by the developer, not by AppBrain. Click to read.
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.
Official page on the App Store
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Overview Alternatives Reviews Rankings Technology
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