Developer: Krueger Systems, Inc.

Current Version: 1.3.1

Last Updated: 5 months ago

Download Size: 6 MB - Download


Calca is a powerful symbolic calculator that updates as you type giving you instant answers. It solves equations and simplifies complex expressions. It's also a rich Markdown text editor so that you can explain your ideas alongside your calculations.

Calca is perfect for professionals and students - anyone who works with numbers and equations. Variables and functions can be created with only a few keystrokes and can be manipulated with a rich library of operators and functions.

Calca updates as you type - just like a spreadsheet. You can declare variables, edit their values and watch everything update before your eyes. Since everything is calculated on the device - no network needed - you get answers instantaneously.

All calculations are stored as plain text so you can easily share them with other editors and move them from device to device. Calca has been designed to work with iCloud documents so all your devices can access your calculations - you'll always have the latest files ready for viewing and editing.

Calca comes with a suite of examples to help you get started covering topics from home mortgages to kinetics. All these examples are fully explained within Calca itself.

Are you still using a desktop calculator? Are you using the silly calculator with the giant buttons that came with your OS? Computers are much more capable than doing simple one-line arithmetic - put your machine to work with Calca!

Calculation Features:

• Variables `x = 42`
• Functions `f(c) = 9/5*c + 32` and even recursive functions
• Units `42 mph in kmph` and currency `¥599 in $`
• Solves equations (`x + 2x + 4x = 42`, what is x?)
• Matrices with inverses so you can solve linear equations
• Sum, prod, map, and reduce operations on lists, matrices, and ranges
• Trigonometry and complex numbers
• Derivatives of functions
• Logic operations and if statements
• Binary math (& and |) and support for binary and hex number (`0xA9` and `0b1010`)
• Keeps track of units (m, s, m/s, m/s^2, etc.) so you can verify your equations as you compute

Please visit to see lots of examples. Thank you for looking!


Release Notes:

* Newly compiled for 64-bit
* Export HTML so you can share nicely formatted documents with other apps


Most Helpful Reviews

Version 0
Review by Baanista

A work of mad genius - It is the love child of soulver and markdown with Google as the proud Godfather. Create reusable functions, find values with Google (including stock quotes and who knows what else), and make them look pretty with Markdown. The output will always be useable as a plain text file. iCloud support so you can build a tool on your Mac and use it on your ipad or iPhone. Thanks Frank for fixing it in one day after breaking iCloud in the 1.1 IOS update. The range of functionality far exceeds my miserable business major math skills. This app deserves a community building tools upon it.

Found helpful by 16 out of 17 people
Version 1.1
Review by Need an update!

Crashes - Crashes everytime I launch it.

Found helpful by 8 out of 29 people

More Reviews for Current Version

Version 1.3.1
Review by SprayFoamEstimator

I use it every day - I am an insulation estimator and I use this app daily. The feature that make it fit into my workflow so well is that I can save a spreadsheet as plain text in a note field on our lead management software. No other spreadsheet that I’m aware of has this capability. The only thing that could make it better for me is if it was available as a Chrome app. All of our workflow is cloud based except for this tool. However, i still very highly recommend this app as it is easy to use and has performed flawlessly.

Found helpful by 1 out of 1 people