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Kontact vs calcurse: catalog facts
Kontact	calcurse
Free Free and open source, developed by the KDE community.	Free Free to download, with donations accepted.
Linux	Linux, Command line
Mail, calendar, contacts and feeds in one window Works offline with your data	Recurring appointments, all-day events and to-dos Scriptable command-line mode
Best suited to the KDE Plasma desktop Large suite with many settings to learn	CalDAV sync is experimental Terminal interface only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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