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GNU Units vs Soulver CLI: catalog facts
GNU Units	Soulver CLI
Free Free software under the GPL, part of the GNU Project.	Free Free to install via Homebrew or GitHub.
Windows, Command line	macOS, Command line
Handles nonlinear conversions such as temperature and wire gauge Converts to and from sums of units like feet plus inches	Natural-language maths, units, currencies and dates in the terminal Accepts piped input for use in scripts
Command-line only, with no graphical interface Takes some learning to write complex expressions	macOS only Small project with limited documentation
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
No account needed	No account needed
Works offline	Not stated if it 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.