---
title: "Calendar0 — AI menubar calendar that saves 20 minutes daily"
description: "Calendar0 is an AI-powered desktop calendar for macOS and Windows that lives next to your clock. See every Google, Microsoft 365 and Apple calendar in one view and schedule meetings by typing what you think."
last_updated: 2026-09-01
canonical_url: https://www.calendar0.app
---

# Calendar0 — AI menubar calendar that saves 20 minutes daily

Calendar0 is an AI-powered desktop calendar for macOS and Windows that lives next to your clock. See every Google, Microsoft 365 and Apple calendar in one view and schedule meetings by typing what you think.

Calendar0 is a desktop calendar app for **macOS** and **Windows** that lives in the menubar / system tray. Click the icon next to your clock to see your full schedule; type a sentence like *"lunch with Sarah tomorrow"* and the AI finds Sarah's email, checks every attendee's availability and sends the invite. Built for managers with 10+ meetings a day.

## The problem it solves

- *"Are you free Thursday at 2?"* — you open three browser tabs to check. Four minutes gone.
- *"Can we move our 1:1?"* — search the meeting, check everyone's calendar, send three emails.
- *"Who's joining from engineering?"* — scramble for email addresses in Slack and the directory.

That's about 20 minutes of calendar admin a day. Calendar0 removes it.

## Features

- **AI that knows everyone** — type `lunch with Sarah` and Calendar0 resolves the contact from Google Contacts, Google Workspace or the Microsoft directory, checks conflicts for every attendee and prevents double-booking across your team. Partial names work (`Sarah` finds `Sarah Johnson`).
- **Read all your calendars** — personal, work and shared calendars from Google and Microsoft in one view, with an instant availability check across every account. The AI knows which calendar to use for which meeting.
- **Bulk operations in seconds** — add buffers between back-to-back meetings with one action, select and modify several events at once, drag to reschedule, resize by dragging edges.
- **Smart AI assistant** — move meetings with natural language: `reschedule my 1:1 to tomorrow`.
- **Private & secure** — your calendar events stay with your provider. Google and Microsoft sign in with OAuth (Calendar0 never sees those passwords); Apple/iCloud connects over CalDAV with an app-specific password. Credentials are stored encrypted — in your device's secure storage by the desktop app, and encrypted at rest in Calendar0's account store for the web app and booking links. The AI only sees what you share with it.
- **Keyboard first** — global hotkeys (`Cmd+Shift+C` on Mac, `Ctrl+Shift+C` on Windows) and shortcuts for everything.
- **Smart notifications** — 5-minute warnings and one-click join for video calls.
- **Always one click away** — your full schedule appears instantly from the menubar, no browser needed.

## Supported calendar providers

- Google Calendar (personal and Google Workspace)
- Microsoft Outlook / Microsoft 365
- Apple Calendar (iCloud)

## Pricing

| Plan | Price | Includes |
|---|---|---|
| **Starter** | $0 | Connect unlimited calendar providers; Drag, resize, edit, and RSVP to events; Join video meetings instantly; Event notifications; 3 free AI chat commands |
| **Lifetime Access** (most popular) | $49 one-time (USD) | Everything in Free, plus:; Unlimited AI chat commands; All future AI improvements; Save 20 minutes daily forever; 14-day money back guarantee |
| **Monthly** | $4.99 / month (USD) | Everything in Free, plus:; Unlimited AI chat commands; All future AI improvements; Save 20 minutes daily; Cancel anytime |

No credit card is needed to start. Download from [https://www.calendar0.app/download](https://www.calendar0.app/download).


## Learn more

- [Download](https://calendar0.app/download)
- [Documentation](https://calendar0.app/docs)
- [Blog](https://calendar0.app/blog)
- [Privacy Policy](https://calendar0.app/privacy-policy) · [Terms of Service](https://calendar0.app/terms-of-service)

## Sitemap

See the [sitemap](https://www.calendar0.app/sitemap.md) for the marketing, documentation and blog pages on https://www.calendar0.app, or [llms.txt](https://www.calendar0.app/llms.txt) for the agent-oriented index.