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AlexCalc vs Rink: catalog facts
AlexCalc	Rink
Free Free to use; the source is published under the AGPL-3.0.	Free Free and open source, licensed under MPL-2.0 and GPL-3.0.
Android, iOS, Web	Windows, macOS, Linux, Web, Command line
Formatted LaTeX display makes long equations easy to verify Handles units, variables and complex numbers	Tracks units through whole calculations Dimensional analysis catches mismatched quantities
The on-screen layout is dense for a first-time user Formal releases are not published on GitHub	Repository is in the middle of moving to Codeberg No prebuilt releases listed on GitHub
Downloadable app, Web application	Downloadable app, Web application
Open source	Open source
License: AGPL-3.0-only	License: MPL-2.0 and GPL-3.0
No account needed	No account needed
Not stated if it 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.