Compare software

Soulver vs KCalc: catalog facts
Soulver	KCalc
Paid $59 one-time purchase after a 60-day free trial, also included in Setapp.	Free Free and open source under the GPL-2.0-or-later licence.
macOS, iOS	Linux
Natural-language calculations with dates, currencies and units Variables and line references keep scenarios editable	Scientific, statistics and numeral system modes Results stack for recalling previous answers
Apple platforms only One-time price is high for a calculator	No graphing Best integrated with KDE Plasma
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0-or-later
Not stated if an account is needed	No account needed
Not stated if it 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.