Compare software

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