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Rink vs GNU Units: catalog facts
Rink	GNU Units
Free Free and open source, licensed under MPL-2.0 and GPL-3.0.	Free Free software under the GPL, part of the GNU Project.
Windows, macOS, Linux, Web, Command line	Windows, Command line
Tracks units through whole calculations Dimensional analysis catches mismatched quantities	Handles nonlinear conversions such as temperature and wire gauge Converts to and from sums of units like feet plus inches
Repository is in the middle of moving to Codeberg No prebuilt releases listed on GitHub	Command-line only, with no graphical interface Takes some learning to write complex expressions
Downloadable app, Web application	Downloadable app
Open source	Open source
License: MPL-2.0 and GPL-3.0	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.