Calendar 366 review

Calendar 366 is a fast, native Mac calendar that doubles as a menu bar app, so you can check the month or add an event without opening a full window. The App Store listing describes 13 views, including year, month, agenda and week layouts of 3 to 14 days, and natural language entry for events. Tasks live inside the calendar with priorities, location alerts and filters. It connects to the Mac's own calendars, iCloud, Google Calendar and Google Tasks, Outlook and Microsoft 365, Todoist, Fastmail and CalDAV, and it can create Zoom, Google Meet and Teams meetings. There are 20 interactive desktop widgets, calendar sets, Shortcuts support, a URL scheme and an MCP integration for AI assistants. Pricing is lower than Fantastical, with Pro at $19.99 a year or a $49.99 one-time purchase. It has far fewer reviews than the bigger names, and a few reviewers mention bugs, so try it before you pay.

Who it is for

Mac users who want many views, Google Tasks and a one-time purchase option at a lower price than Fantastical.

Price

Free download; Calendar 366 Pro $19.99 per year (about $1.67 per month) or a $49.99 one-time Pro purchase on the US Mac App Store.

Calendar 366 Pro (Yearly) $19.99
Quoted from the vendor pricing page on November 10, 2026.

Key features

• 13 views including year, month, agenda, week and day, with 3 to 14 day weeks
• Natural language event entry
• Google Calendar and Google Tasks, Outlook, Microsoft 365, iCloud, Todoist, Fastmail and CalDAV
• Create Zoom, Google Meet and Microsoft Teams meetings
• 20 desktop widgets and Apple Shortcuts support

Strengths and weaknesses

• Strength: Works as a standalone app and from the menu bar
• Strength: No account required, and the vendor says no analytics or tracking
• Strength: One-time Pro purchase available as well as a yearly plan
• Weakness: Fewer App Store ratings than the larger apps
• Weakness: Pro features need a paid plan or license
• Weakness: Some reviewers report bugs when duplicating events

Key facts

• Pro yearly: $19.99
• Pro one-time: $49.99
• Views: 13
• Platforms: Mac, iPad, iPhone, Apple Watch

Where it ranks

Calendar 366 is No. 4 in our Best Calendar Apps for Mac verdict.