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Qalculate!SpeedCrunch
Free

Free and open source under the GPL.

 Free

Free and open source under the GPL.

Windows, macOS, Linux Windows, macOS, Linux
  • Unit calculations, unit conversion and live currency conversion built in
  • Symbolic calculation including integrals and equations, with arbitrary precision
  • Results update as you type
  • Up to 50 digits of precision
  • Currency rates need an internet connection to update
  • The sheer number of functions and settings is daunting at first
  • Latest advertised release is the long-standing 0.12
  • Keyboard-centred design may not suit button-only users
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License: GPL-2.0-or-later
No account needed No account needed
Works offline Works offline

Checked September 21, 2026

Checked October 2, 2026

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