Calendar 366 brings events and tasks together in one native app for iPhone, iPhone Duo, iPad, Apple Watch and Mac. It works with iCloud, Google, Outlook & Microsoft 365, CalDAV and Todoist. What makes it different: 13 views, Calendar Sets, natural language input, Siri AI and MCP support for Claude and LM Studio. On the Mac it also lives in the menu bar. New in 4.0: iPhone Duo support, redesigned event and task details, new app icons and more reliable invitations.

A calendar that adapts to how you work — not the other way around. 13 views you can combine freely, natural language input ("Meeting with Alex tomorrow 10am"), tasks right inside the calendar, and drag & drop to reschedule. 20 widgets, 10 watch complications, travel time, weather everywhere, calendar groups, attendees and categories. Works with Apple Calendar, iCloud, Google, Outlook, Microsoft 365, Todoist, Fastmail and CalDAV. No account, no tracking, no data on our servers.