Qalculate!
Qalculate! is a free, open-source utility app for Android. Powerful and versatile multi-purpose calculator. It has 487 GitHub stars and is released under the GPL-2.0-only license, and you can install it from F-Droid and Google Play.
github.com/jherkenhoff/qalculate-android (opens in a new tab)
- Android
- Jetpack Compose
- Utilities
- Actively maintained
About Qalculate!
Qalculate! - the ultimate multi-purpose calculator - is now finally available on Android! It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation). Features include a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation or interval arithmetic.
Privacy and F-Droid
F-Droid builds Qalculate! 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.
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What is Qalculate!?
Qalculate! is a free, open-source utility app for Android. Powerful and versatile multi-purpose calculator. It has 487 GitHub stars and is released under the GPL-2.0-only license, and you can install it from F-Droid and Google Play.
Is Qalculate! free and open source?
Yes. Qalculate!'s source code is public on GitHub under the GPL-2.0-only 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 Qalculate!?
You can install Qalculate! from F-Droid (package com.jherkenhoff.qalculate) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v0.2.3).
Is Qalculate! still maintained?
The repository's most recent commit was on Sep 2, 2026. Its F-Droid listing was last updated on Sep 28, 2026. appsgit only lists apps whose repository had a commit in the last six months.