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Calculator vs x11-calc: catalog facts
Calculator	x11-calc
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later licence.
Linux	Linux
Native look on the COSMIC desktop History of earlier calculations you can reuse	Faithful simulation of many HP calculator models Runs original firmware for accurate behaviour
Basic calculator without advanced scientific features documented Designed mainly for COSMIC	Niche audience familiar with HP calculators Linux-focused distribution
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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