Compare software

Uno CalculatorQalculate!
Free

Free to use; the underlying calculator code is under the Apache-2.0 licence.

 Free

Free and open source under the GPL.

macOS, Linux, Android, iOS, Web Windows, macOS, Linux
  • Familiar Windows Calculator layout on other systems
  • Scientific and Programmer modes
  • Unit calculations, unit conversion and live currency conversion built in
  • Symbolic calculation including integrals and equations, with arbitrary precision
  • Initial load can be slow
  • Built mainly as a framework showcase
  • Currency rates need an internet connection to update
  • The sheer number of functions and settings is daunting at first
Downloadable app, Web application Downloadable app
Open source Open source
License: Apache-2.0 License: GPL-2.0
No account needed No account needed
Not stated if it works offline Works offline

Checked October 1, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.