Compare software

Soulver CLI vs kalker: catalog facts
Soulver CLI	kalker
Free Free to install via Homebrew or GitHub.	Free Free and open source under the MIT licence.
macOS, Command line	Windows, macOS, Linux, Android, Web, Command line
Natural-language maths, units, currencies and dates in the terminal Accepts piped input for use in scripts	Natural math syntax with user-defined functions and variables Handles complex numbers, vectors and matrices
macOS only Small project with limited documentation	Derivatives and integrals are numerical estimates Higher-order derivatives can be inaccurate
Downloadable app	Downloadable app, Web application
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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