Compare software

OneCalendar vs Notion Calendar: catalog facts
OneCalendar	Notion Calendar
Free Free to download from the app stores.	Free Free to use.
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS
Supports Google, Outlook, Exchange, iCloud, CalDAV and many other providers Available on Android, iPhone, iPad, Mac and Windows	Free Tight integration with Notion databases and docs
Closed source No Linux version	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
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.