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Orage vs Kairos: catalog facts
Orage	Kairos
Free Free and open source as part of the Xfce project.	Free Free and open source under the GPL-3.0 or later licence.
Linux	Linux
Light on resources Uses the standard iCal format with import and export	Designed for touch input on tablets Works well alongside tiling window managers
Single user only, no group calendars Linux desktop only	Young project with little documentation Linux only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
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 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.