Three steps, then it stays quiet.
Sync runs in both directions with conflict checks built in, and every calendar ends up in the same state.
Connect your calendars
Connect Google or Outlook with one OAuth click. Connect iCloud or any CalDAV server with an app-specific password. You can also create a shared calendar here.
Everything stays in agreement
Edit on any calendar. The change reaches all the others in every direction, and any calendar can be the source.
Stay in control
Every change is in the history and every delete can be restored. If the same event is edited in two places, it pauses until you choose which version to keep.
What you actually get
Six chaptersTrue bidirectional sync
It isn't a one-way import. A change made on any connected calendar reaches all the others, with no loop-back writes.
Google, Microsoft, Apple and CalDAV
Connect Google and Outlook with OAuth, and iCloud, Fastmail or Nextcloud over CalDAV. Kelbra also has its own shared calendar that any member can edit.
Real conflict detection
If the same event changes on two calendars, Kelbra keeps both versions until you choose one.
How conflict review works →