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By Krueger Systems, Inc.

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Calca is a powerful symbolic calculator that gives you instant answers as you type. It solves equations and simplifies complex expressions - it's a computer algebra system in your pocket! 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!

What's New in Version 1.2.2

• New thumbnail display of calculations
• Improved cursor movement and scrolling
• x-callback-url support
• Many bug fixes and improvements!


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Customer Reviews

Replaces several other apps with Magic!

This app is fantastic. Can use it as a calculator, for unit conversion, to write basic Markdown text, and then to build really powerful computational tools to carry around in your pocket. Often times at work I need to whip out a spreadsheet just to figure something out, like how to split the bill for a car rental with a client when I took a couple vacation days on the end of a business trip. This tool is way better for problems like that because, unlike a spreadsheet you see the math working in real time and everything is clearly labelled. Of course you can do this with a spreadsheet but it's so much easier with this app.

Wish it had some graphing like tydlig, for me what this app does is way more valuable, just think that would be a nice touch...

Also would be nice if it could format math like mathml... Again, not needed, just nice to have...

Just crashes on my iPad 3

I'm giving this five stars because I'm so excited about the concept of a text editor that also allows freeform calculation in a text editor. I should note, that I've been unable to run it on my iPad, it immediately crashes on start up. I've tried rebooting my iPad, to no avail. Looking forward to the first update that hopefully fixes this crash bug. (Edit: today, it still crashes, but it shows a little lined area on the left side of the screen before crashing)

Follow-up: one year later, October 2014: I just installed iOS 8.1, and deleted calca and reinstalled it - no luck, continues to just load up a white screen and crash. Having two versions of iOS over two years, and never having managed to actually get it to load, I'm going to have to downgrade this application to One star .

Best "Non-Traditional" Calculator

Amazing app for performing complicated calculations and analysis. There are a few apps out there that do similar things but this one has them all beat. Simple concept without a weird, obscure and hard-to-remember interface. Just does what you need it to do. Well worth the price.

View In iTunes
This app is designed for both iPhone and iPad
  • $2.99
  • Category: Productivity
  • Updated:
  • Version: 1.2.2
  • Size: 11.7 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

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