Compare software

Calendr vs Notion Calendar: catalog facts
Calendr	Notion Calendar
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free to use.
macOS	Windows, macOS, Android, iOS
Supports quick event entry with natural-language dates.	Free Tight integration with Notion databases and docs
Requires macOS calendar access for event integration.	Built around Google Calendar and Notion Proprietary
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	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 September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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