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Notion CalendarCalendr
Free

Free to use.

 Free

The open-source software is available without a license fee. Hosting, hardware and…

Windows, macOS, Android, iOS macOS
  • Free
  • Tight integration with Notion databases and docs
  • Supports quick event entry with natural-language dates.
  • Built around Google Calendar and Notion
  • Proprietary
  • Requires macOS calendar access for event integration.
Downloadable app Downloadable app
Closed source Open source
License not stated License: MIT
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

Checked September 23, 2026

Checked September 22, 2026

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