# Calendar 366

> Calendar and task app for iPhone, iPad, Apple Watch and Mac

Calendar 366 is a calendar and task app for Apple devices made by Vincent Miethe, a developer in Berlin. It shows events and tasks from iCloud, Google, Outlook, Microsoft 365, Todoist, Fastmail and CalDAV accounts in one place, takes typed natural-language entries, and adds a menu bar calendar on the Mac. The app is a free download with basic features, and a Pro subscription or one-time purchase unlocks the rest.

- **Category:** Calendar & Scheduling
- **Made by:** Vincent Miethe
- **Website:** https://calendar366.com/
- **Runs on:** iOS, macOS
- **Facts last checked:** Oct 9, 2026

## Pricing

Calendar 366 has a free plan. Paid plans start at $19.99 per year for Pro on the App Store.

- **Pricing model:** Free plan
- **Free plan:** Free download with basic features. The site does not list which features are premium; all of them can be tried for 7 days before choosing a subscription or a one-time purchase.
- **Free trial:** 7-day trial of all premium features.

| Plan | Price | What you get |
| --- | --- | --- |
| Free | $0 | Free download with basic features. Neither the site nor the App Store listing says which features stay free after the 7-day trial. |
| Pro (Yearly) | $19.99 per year | Yearly subscription that unlocks the premium features, as labelled in the App Store's in-app purchase list. |
| Pro (iOS) | $19.99 billing basis not shown on the App Store listing | Listed without a period. The vendor's FAQ says a one-time purchase is offered next to the subscriptions. |
| Pro | $49.99 billing basis not shown on the App Store listing | Listed without a period or platform label. The site describes the app as a universal purchase across iPhone, iPad, Apple Watch and Mac. |
| Pro Family (Monthly) | $4.99 per month, or $29.99 per year as Pro Family (Yearly) | Family version of the Pro subscription, with monthly and yearly options in the App Store's in-app purchase list. |
| Pro Family (iOS) | $29.99 billing basis not shown on the App Store listing | Family version listed without a period. A second item named Pro Family, with no platform label, is listed at $69.99. |

Read from https://apps.apple.com/us/app/calendar-366-events-tasks/id6502818600 on Oct 9, 2026. Prices change, so confirm with Calendar 366 before buying.

## Ways to pay less

- **One-time purchase in place of a subscription** (Lifetime license): The FAQ on Calendar 366's site says that after the 7-day trial you can choose a subscription or a one-time purchase. The App Store lists Pro (iOS) at $19.99 and Pro at $49.99 without a billing period. Source: https://calendar366.com/

## Key features

- **Natural language entry:** Type what, when and where to create an event or task, with shorthand such as /Work for a calendar, -r1w for a weekly repeat and ! for priority. Apple Intelligence can be picked as the engine on iOS, iPadOS or macOS 27.
- **Tasks next to events:** Tasks sit in the calendar with reminders, location-based alerts, priorities and notes, and can be filtered by today, overdue or important. They sync with Apple Reminders, Google Tasks, Microsoft to-dos and Todoist.
- **Views and calendar sets:** Year, month, week, day and agenda views, plus month and week views paired with a list, in portrait and landscape. Calendar sets group calendars and lists and sync across devices.
- **Meetings and invitations:** Creates Zoom, Google Meet and Microsoft Teams meetings and opens join links for services such as Webex and FaceTime. Invitations arrive in an inbox and can be accepted or declined there.
- **Widgets, Apple Watch and menu bar:** 20 home screen and desktop widgets, 6 lock screen widgets and 10 watch complications. The Watch app creates events and completes tasks, and the Mac version adds a full menu bar calendar.
- **Shortcuts, URL scheme and MCP:** Supports Apple Shortcuts and a cal366:// URL scheme for automation. On Mac it can connect to Claude Desktop or LM Studio through the Model Context Protocol to show, create and reschedule entries by chat.

## Good for

- People who keep everything on Apple devices and want events and tasks in one app
- Mixing iCloud, Google, Microsoft 365, Fastmail and CalDAV accounts
- Buyers who prefer a one-time purchase to a subscription
- Mac users who want to manage their calendar from an AI assistant over MCP

## Worth knowing

- Apple only: iPhone, iPad, Apple Watch and Mac. No Android, Windows or web version is listed.
- After the 7-day trial the free download keeps only basic features, and the vendor does not publish which features are premium.
- Prices appear only as App Store in-app purchases. Several have no billing period, and no monthly price for single-user Pro is shown.
- Siri AI is in beta, English only, and needs iOS, iPadOS or macOS 27. The MCP connection to AI assistants is Mac only.

## Works with

iCloud, Google Calendar, Outlook, Microsoft 365, Todoist, Zoom, Fastmail, Claude Desktop

**Tags:** Calendar, Tasks, Natural-language input, Menu bar app, One-time purchase, AI features

## Alternatives

- [Fantastical](https://toolgpa.com/tools/fantastical): Calendar and tasks app for Apple devices and Windows. [Compare](https://toolgpa.com/compare/calendar-366-vs-fantastical)
- [BusyCal](https://toolgpa.com/tools/busycal): Customizable calendar and task app for Mac and iPhone. [Compare](https://toolgpa.com/compare/busycal-vs-calendar-366)
- [Calendars by Readdle](https://toolgpa.com/tools/calendars-by-readdle): Calendar and task planner for iPhone, iPad, Mac and Apple Watch. [Compare](https://toolgpa.com/compare/calendar-366-vs-calendars-by-readdle)
- [Apple Calendar](https://toolgpa.com/tools/apple-calendar): Free built-in calendar for iPhone, iPad, Mac and iCloud.com. [Compare](https://toolgpa.com/compare/apple-calendar-vs-calendar-366)
- [Dato](https://toolgpa.com/tools/dato): Mac menu bar calendar with world clocks and meeting alerts. [Compare](https://toolgpa.com/compare/calendar-366-vs-dato)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026:

- https://calendar366.com/
- https://apps.apple.com/us/app/calendar-366-events-tasks/id6502818600
- https://calendar366.com/help/index.html
- https://calendar366.com/about/legal/
- https://calendar366.com/about/imprint/

Page: https://toolgpa.com/tools/calendar-366
Listed by ToolGPA (toolgpa.com).