CalendarSync
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One calendar schedule,
wherever you keep it.

Link iCloud, Google and Outlook calendars and keep them in step — one-way or both ways. Decide exactly how much detail each copy carries, and what happens when someone deletes or edits a mirrored event.

Get started How it works

This instance is in test mode: sign in with any email address and the code 123123. No mail is sent.

Bring your own accounts

Connect as many accounts as you like — two iCloud accounts, a work Google account and a personal Outlook mailbox all at once. Each one stays separate and revocable.

  • CalDAV / iCloud available
  • Google Calendar needs configuration
  • Microsoft 365 / Outlook needs configuration

Say exactly what crosses over

Copy events in full, or let the other calendar see only that you are Busy — times and recurrence intact, title and notes withheld. Strip locations, attendees, or the description while keeping the block in the right place.

Choose what a deletion means

Deleting a mirrored event can mean three different things. Delete the original too, detach it so it is never copied back, or treat it as a slip and restore the copy. You pick per link, not per app.

Built so it cannot loop

Two calendars that mirror each other can fight forever. This one records exactly what it wrote, recognises its own work coming back, and refuses to copy a copy.

  1. Provenance. Every mirrored event carries a private stamp saying where it came from.
  2. A ledger. Each pairing is recorded, so an echo is identified by comparison, not by guesswork.
  3. A hop limit. A copy of a copy is never written onward, so a chain of links cannot cascade.
  4. Real brakes. Cooldowns, write caps and windowed scans bound a misconfiguration to a trickle.