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Calendar 366 vs Notion Calendar: catalog facts
Calendar 366	Notion Calendar
Freemium Subscriptions are sold through the App Store; check the site for current pricing.	Free Free to use.
macOS, iOS	Windows, macOS, Android, iOS
Events and tasks shown together in one calendar Natural-language event entry	Free Tight integration with Notion databases and docs
Apple platforms only Pricing details are not stated on the homepage	Built around Google Calendar and Notion Proprietary
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it 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 September 23, 2026

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