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Calculator vs Kalk: catalog facts
Calculator	Kalk
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later.
Linux	Linux
Native look on the COSMIC desktop History of earlier calculations you can reuse	Adapts to desktop and phone screens Regular releases with KDE Gear
Basic calculator without advanced scientific features documented Designed mainly for COSMIC	Linux only Few details on advanced features in the research
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.