ArityCalc
ArityCalc is a free, open-source utility app for Android. Scientific calculator for Android 5+. It has 207 GitHub stars and is released under the Apache-2.0 license, and you can install it from F-Droid.
github.com/woheller69/Arity (opens in a new tab)
Data as of from the GitHub API and the F-Droid index; description from the project's repository or F-Droid listing. Report an error
About ArityCalc
Scientific calculator with complex numbers and 2D/3D graphing of user-defined functions. - Trigonometric functions - Combinatorial functions - Complex numbers - Binary, octal, hexadecimal numbers - Animated 3D graphing - Graphing multiple 2D function on a single graph - Graphing of derivatives for 2D functions - Screenshots of the graphs
Privacy and F-Droid
F-Droid builds ArityCalc from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
Similar apps
More open-source utility apps
Pixiv for Muzei 3
yellowbluesky/PixivforMuzei3
Best Pixiv plugin for Muzei 3.
Active · last commit Oct 1, 2026
UtilitiesAndroid
Wallet
sidhant947/Wallet
Offline card vault with AES-256-GCM encryption.
Active · last commit Sep 10, 2026
UtilitiesAndroid
NerdCalci
vishaltelangre/NerdCalci
Calculator for nerds with variables, syntax highlighting, and file sessions.
Active · last commit Oct 11, 2026
UtilitiesAndroid
AppListBackup
AndroidLabs-org/AppListBackup
Effortlessly create and manage backups of a list of your installed apps.
Active · last commit Oct 9, 2026
UtilitiesAndroid
Dark Mode Live Wallpaper
cvzi/darkmodewallpaper
Live wallpaper that respects dark theme mode.
Active · last commit Oct 24, 2026
UtilitiesAndroid
Quick Ball
chayanforyou/QuickBall
A Quick Action Ball that gives fast access to controls —volume, brightness, lock.
Active · last commit Oct 15, 2026
UtilitiesAndroid
Is ArityCalc free and open source?
Yes. ArityCalc's source code is public on GitHub under the Apache-2.0 license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install ArityCalc?
You can install ArityCalc from F-Droid (package org.woheller69.arity); the links are on this page. Its GitHub repository also publishes releases (latest: V1.59).
Is ArityCalc still maintained?
The repository's most recent commit was on Sep 29, 2026. Its F-Droid listing was last updated on Oct 2, 2026. appsgit only lists apps whose repository had a commit in the last six months.