Compare software

Rink vs fend: catalog facts
Rink	fend
Free Free and open source, licensed under MPL-2.0 and GPL-3.0.	Free Free and open source.
Windows, macOS, Linux, Web, Command line	Command line
Tracks units through whole calculations Dimensional analysis catches mismatched quantities	Arbitrary-precision arithmetic Built-in unit handling and conversion
Repository is in the middle of moving to Codeberg No prebuilt releases listed on GitHub	Command-line interface only, with no graphical calculator
Downloadable app, Web application	Downloadable app
Open source	Open source
License: MPL-2.0 and GPL-3.0	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 September 24, 2026

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