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SpeedCrunch vs KCalc: catalog facts
SpeedCrunch	KCalc
Free Free and open source under the GPL.	Free Free and open source under the GPL-2.0-or-later licence.
Windows, macOS, Linux	Linux
Results update as you type Up to 50 digits of precision	Scientific, statistics and numeral system modes Results stack for recalling previous answers
Latest advertised release is the long-standing 0.12 Keyboard-centred design may not suit button-only users	No graphing Best integrated with KDE Plasma
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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