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Soulver CLI vs GNU Units: catalog facts
Soulver CLI	GNU Units
Free Free to install via Homebrew or GitHub.	Free Free software under the GPL, part of the GNU Project.
macOS, Command line	Windows, Command line
Natural-language maths, units, currencies and dates in the terminal Accepts piped input for use in scripts	Handles nonlinear conversions such as temperature and wire gauge Converts to and from sums of units like feet plus inches
macOS only Small project with limited documentation	Command-line only, with no graphical interface Takes some learning to write complex expressions
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
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.