Is there a web app, or do I install something?

It is available on the web, Mac, Windows and Linux.

Which calendars does it work with?

It works with Google Calendar, Outlook and iCloud.

Your events stay with Google, Microsoft or Apple, and Calendar0 encrypts the keys it holds to each account. The app never sees your passwords.

Cross-calendar view combines Google, Outlook and iCloud into a single weekly view.
Quick add creates an event from one typed sentence, such as "Lunch with Marco tomorrow at 1 at Bar Pisacco".
Booking links show only your free times across all connected calendars, and guests can book, reschedule or cancel.
The AI assistant takes natural-language questions to schedule, move, or find time.
The MCP connector lets Claude and ChatGPT query your calendar week.
Desktop reminders sit in the menu bar or system tray and open the video call with one click.

The free plan includes 100 assistant chats.

Runs on the web, macOS, Windows and Linux.
Events stay with Google, Microsoft or Apple, and Calendar0 encrypts the keys it holds to each account; the app never sees your passwords.

Is there a web app, or do I install something?: It is available on the web, Mac, Windows and Linux.
Which calendars does it work with?: It works with Google Calendar, Outlook and iCloud.
Is my data safe?: Your events stay with Google, Microsoft or Apple, and Calendar0 encrypts the keys it holds to each account. The app never sees your passwords.

Schedule in seconds.

The calendar that books your meetings and takes notes on your calls