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Modular Calculatorkalker
Free

Free and open source under GPL-3.0-or-later.

 Free

Free and open source under the MIT licence.

Linux Windows, macOS, Linux, Android, Web, Command line
  • Handles variables, functions, units and arrays
  • Supports calculations with numbers in different bases
  • Natural math syntax with user-defined functions and variables
  • Handles complex numbers, vectors and matrices
  • Linux is the only listed platform
  • Derivatives and integrals are numerical estimates
  • Higher-order derivatives can be inaccurate
Downloadable app Downloadable app, Web application
Open source Open source
License: GPL-3.0-or-later License: MIT
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked October 2, 2026

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