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ABCalc PlusQalculate!
Paid

ABCalc Plus is a paid edition; the standard ABCalc version is free.

 Free

Free and open source under the GPL.

Windows, macOS, Linux, Android, iOS Windows, macOS, Linux
  • More than 100 built-in functions and over 100 unit conversions
  • Supports complex numbers and vectors
  • Unit calculations, unit conversion and live currency conversion built in
  • Symbolic calculation including integrals and equations, with arbitrary precision
  • Some features and cloud sync depend on the platform
  • Currency rates need an internet connection to update
  • The sheer number of functions and settings is daunting at first
Downloadable app Downloadable app
Closed source Open source
License: proprietary License: GPL-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked September 21, 2026

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