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kalker vs Genius: catalog facts
kalker	Genius
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux, Android, Web, Command line	Linux
Natural math syntax with user-defined functions and variables Handles complex numbers, vectors and matrices	Arbitrary precision integers and rational numbers Broad coverage of linear algebra, number theory and statistics
Derivatives and integrals are numerical estimates Higher-order derivatives can be inaccurate	Symbolic calculation is very limited Linux only
Downloadable app, Web application	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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