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Merkuro vs Calindori: catalog facts
Merkuro	Calindori
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the GPL-3.0 or later licence.
Linux	Linux
Supports Nextcloud, Google Calendar, Outlook and CalDAV calendars Combines events, tasks and contacts in one app	Stores calendars in the standard iCal format Handles both events and to-do items
Linux only Fits best within the KDE Plasma desktop	Linux only Basic feature set compared with full desktop calendar suites
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	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.