Calca app icon

Calca

by Krueger Systems, Inc.

FlatSentimenttrend not available
Appeye score 85 out of 100, from 124 reviews (moderate confidence)

124 reviews analysed · 12 Jul 2013 – 4 Nov 2025 · scored 21 Sep 2026

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Based on 124 reviews from 12 Jul 2013 - 4 Nov 2025.

Overview

Appeye score
85/100moderate confidence
Category rank
#344 of 2,353Productivity
Reviews analysed
124Scored reviews from the App Store.
Sentiment trend
FlatIts trend signals are holding steady.
App Store
4.5

154 ratings

Review sentiment

78
App nameCalca
SellerKrueger Systems, Inc.
GenreProductivity
Version1.7.2
Content rating4+
Requires iOS15.0
Size78 MB
Released6 Jul 2013
Current version17 Oct 2025
View on App Store
App 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

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