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GNOME Calendar vs Merkuro: catalog facts
GNOME Calendar	Merkuro
Free Free GNOME application supported by donations.	Free Free and open source under the GPL-3.0-or-later licence.
Linux	Linux
Syncs with Nextcloud, Google Calendar and CalDAV servers Local calendars work fully offline	Supports Nextcloud, Google Calendar, Outlook and CalDAV calendars Combines events, tasks and contacts in one app
Designed for the GNOME desktop on Linux Kept deliberately simple, with fewer features than full groupware clients	Linux only Fits best within the KDE Plasma desktop
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 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.