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KCalc vs PCalc: catalog facts
KCalc	PCalc
Free Free and open source under the GPL-2.0-or-later licence.	Paid Paid app, sold separately for Mac and for iOS devices.
Linux	macOS, iOS
Scientific, statistics and numeral system modes Results stack for recalling previous answers	RPN mode alongside standard entry with parentheses Hexadecimal, octal and binary calculations
No graphing Best integrated with KDE Plasma	Apple platforms only Paid, with Mac and iOS versions bought separately
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 September 23, 2026

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