Compare software

Calendar 366 vs Google Calendar: catalog facts
Calendar 366	Google Calendar
Freemium Subscriptions are sold through the App Store; check the site for current pricing.	Free Free with a Google account.
macOS, iOS	Web
Events and tasks shown together in one calendar Natural-language event entry	Free to use Syncs across devices
Apple platforms only Pricing details are not stated on the homepage	Requires a Google account Data is stored on Google's servers
Downloadable app	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account 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.