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Modular Calculator vs fend: catalog facts
Modular Calculator	fend
Free Free and open source under GPL-3.0-or-later.	Free Free and open source.
Linux	Command line
Handles variables, functions, units and arrays Supports calculations with numbers in different bases	Arbitrary-precision arithmetic Built-in unit handling and conversion
Linux is the only listed platform	Command-line interface only, with no graphical calculator
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 24, 2026

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