Calca

Calca

By Krueger Systems, Inc.

  • Category: Productivity
  • Release Date: 2013-07-06
  • Current Version: 1.5.1
  • Adult Rating: 4+
  • File Size: 21.85 MB
  • Developer: Krueger Systems, Inc.
  • Compatibility: Requires iOS 9.0 or later.
Score: 4.51111
4.51111
From 135 Ratings
$4.99 On itunes

Description

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 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!

Screenshots

Reviews

  • Excellent App

    5
    By LAX20531
    This app is unique and there is nothing else quite like it. I use it in place of Excel when multiple calculations are required along with extensive text. That said, it’s been several years since it’s been updated so I’m concerned the developer may have abandoned the project. Calca is among my core apps so I’d be open to a subscription offering to compensate the developer and ensure it remains sustainable.

  • Love this app, just wish there were more frequent updates

    4
    By E_C
    I really dig the approach this app takes to text + free-form calculations. I use Markdown all the time, so that's a bonus, but the app really shines in the way it interprets text and functions in-place. It has far more power under the hood than I could ever use so I only have a few surface-level nitpicks: * Document management on iOS/iPadOs is clunky. * I still hit occasional crasher bugs. * I wish the iOS/iPadOS versions were updated more frequently. I don't think it needs to roll in all the latest platform features, but some bug fixes and polish would be nice.

  • No longer usable on iPad

    1
    By boldcity
    When you're using the Magic Keyboard, you can't type in numbers anymore. Once you type a number, it switches into this weird overwrite mode, where every number you type overwrites the current number. For example, let's say you want to type 1234. You'll type 1, which will appear. Then 2 overwrites 1. And then 3 overwrites 2. And then 4 overwrites 3. So instead of 1234, you just get 4. Useless.

  • Really a fun calculator, spreadsheet and document in one

    5
    By Mdiza
    This is such a useful app, with text documents coming alive as computational documents. Like a spreadsheet in a way, but in a different medium. Truly wonderful

  • Breaking bug on iPad Pro 12.9 with keyboard

    5
    By ratchetcat
    Calca is one of my favorite apps. I use it regularly on my phone, laptop, etc. I desperately wish I could use it on the iPad Pro with Magic Keyboard folio. Unfortunately, in that context, I'm usually trying to total line items under a 'total +=' line. For every line item, when I start typing digits, the app highlights the entry as though I'm cutting / pasting and does not permit me to enter amount normally. I can work around it -- to a degree -- by separating each digit with a non-numeric character, but I usually just give up and go to a different machine. Hoping the developer will see this and determine what causes / resolves the problem. Huge fan, otherwise, and leaving 5 star review because it works on every other device perfectly.

  • Edit: BEST CALCULATOR APP

    5
    By jpjerkins
    I left a 1-star review a few years ago because I couldn’t create new sheets (“calculations”) in it. But now it’s the only calculator app I use. Functions. Graphs. Units and unit conversions. Markdown for comments. And all with a pretty intuitive syntax that’s easy to get used to. Now that my kids are doing high-school level math, it’s invaluable for checking their work.

  • Not functional with Magic Keyboard

    2
    By bigkraig
    This is really too bad because I have been using Calca for years, and there still isn’t anything that compares. You can work around the input bugs by changing your calculations to text with a #, but it’s a pretty bad experience.

  • Fantastic app, with one modern caveat

    5
    By Christian E.
    I’ve used Calca for years on iOS and Mac, and I love it for all sorts of computation. I did run into one issue: I recently got an iPad Pro with a Magic Keyboard, and it seems to have troubles with the focus system, making numeric entry very, very cumbersome with the Magic Keyboard.

  • Does not work with iPad keyboard - 12 months waiting

    3
    By 9Claude
    Has not worked with the iPad magic keyboard for more than 12 months.

  • Great for the toughest problems

    5
    By David H Dennis
    This is a mathematical sketch pad that tackles the toughest problems with aplomb. If you like bc on your computer this is much more fun and powerful. Like a spreadsheet it recalculates dynamically. Unlike a spreadsheet calculations are clearly visible, especially when they are complex.

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