United StatesCalca 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 http://calca.io to see lots of examples. Thank you for looking!
Still my Go-To Calculater
I love using this app. I wish every text editor had the functionality of Calca built in. As it is, it is very useful. Also being able to use it on the iPad and iPhone with the same files via iCloud is a huge plus! Thanks for all the years of having this great app available!
United StatesFantastic
One of the best gems on the app store - deserves to be better known. Handing tool to give life to my notes. Love it
United StatesSome Broken Bits
Some features seem to be broken without any new updates (11 months ago last update). Dark mode does not work, rendering the app useless if your Mac is set to auto-switch at night. Black text on black screen tends to be hard to see. Google searches fail every time too. And I have just barely started using the app. Great concept, but quickly falling out of love.
United StatesFantastic App
I use this app regularly and it's a joy to use. I don't use a many of it's features and it's still worth it. Well done.
United StatesSo-so
2020 Update: It's officially completely unusable in "dark mode" and clearly abandonware. Avoid. The worst thing about developers relying upon the App Store as their sole distribution channel has to be the fact that it is now impossible to try anything out before you buy it. Granted, the price is not extravagant in any way, but if I had to do it over again, I probably wouldn’t buy Calca. It works well enough for its intended purpose, and I generally find it more intuitive than a spreadsheet, but given the fact that it’s chosen to present its entire UI through a text editor, it’s an absolutely miserable one. The goofy font changes that happen as you type make it extremely difficult to concentrate on anything and are a rather poor substitute for actual syntax highlighting. If you don’t like the font in general, too bad; all you can change the size. Prefer something other than a garish white field to stare at? Sorry, no deal. Tab stops? It’s anybody’s guess where they’ll fall. Who needs to align anything? Crazy people, apparently. But hey, it supports Markdown, so John Gruber’s going to plug it no matter what. Obviously it makes no sense to even try to mimic anyone’s favorite text editor since their feature sets can be quite voluminous, but at the very least, make it possible to edit a text file open in Calca in something else that actually works and have it pick up the changes for re-rendering. This doesn’t work at all, so don’t bother trying. I like the idea, but it should probably be implemented as a plugin of some sort rather than an anemic application.
United StatesMore powerful than Soulver/Numi
I like that this is the more full-featured of the notepad calculator apps when compared with Soulver/Numi/Speedcrunch. My only complaint is the syntax is a bit more intrusive so it doesn't quite have the magic feeling of writing plain english that Soulver/Numi do.
United StatesLove this app.
This app is exactly what I have been looking for for a long time. It will make my math homework much easier. Thanks so much for this amazing program!
United States
round() function in version 1.5.2 Previous changes
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