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fend vs bcal: catalog facts
fend	bcal
Free Free and open source.	Free Free and open source under the GPL-3.0-or-later license.
Command line	Command line
Arbitrary-precision arithmetic Built-in unit handling and conversion	Converts between SI and IEC storage units Handles byte addresses and LBA or CHS calculations
Command-line interface only, with no graphical calculator	Supports 64-bit operating systems only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 8, 2026

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