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KCalc vs Calculator: catalog facts
KCalc	Calculator
Free Free and open source under the GPL-2.0-or-later licence.	Free Free and open source under the GPL-3.0 licence.
Linux	Linux
Scientific, statistics and numeral system modes Results stack for recalling previous answers	Native look on the COSMIC desktop History of earlier calculations you can reuse
No graphing Best integrated with KDE Plasma	Basic calculator without advanced scientific features documented Designed mainly for COSMIC
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-3.0-only
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.