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kalker vs KAlgebra: catalog facts
kalker	KAlgebra
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-2.0-or-later licence.
Windows, macOS, Linux, Android, Web, Command line	Linux
Natural math syntax with user-defined functions and variables Handles complex numbers, vectors and matrices	2D and 3D function plotting Symbolic and analysis features beyond basic arithmetic
Derivatives and integrals are numerical estimates Higher-order derivatives can be inaccurate	Linux only in the published downloads Expression syntax takes some learning
Downloadable app, Web application	Downloadable app
Open source	Open source
License: MIT	License: GPL-2.0-or-later
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.