Kalender-Sync
by Kalender-Sync
GDPR-compliant calendar sync for Outlook, Google and Apple – no more double bookings.
Kalender-Sync connects your calendars across providers – Microsoft 365/Outlook, Google Calendar and Apple/CalDAV. Events in one calendar automatically block the time in your other calendars. No more double bookings, no manually maintained blockers.
Who is it for? Anyone juggling more than one calendar: employees with a side business, consultants and freelancers with multiple client mailboxes, teams that want to share availability – and everyone who keeps work and private life separate but still needs one complete view of their schedule.
How it works:
- Connect calendars: Link your Microsoft, Google or Apple/CalDAV account in a few clicks (OAuth – no password sharing for Microsoft and Google).
- Set up a sync: Pick source and target – two-way if you like.
- Control visibility: Copy full event details or show only a "Busy" blocker without any content – your choice per sync.
- Done: Changes keep syncing automatically.
Works for teams too: Share your availability with colleagues – no mailbox delegation, no IT project required.
Privacy first: Kalender-Sync is GDPR-compliant, built in Germany and hosted in the EU. Credentials are stored encrypted, and event data is processed only as far as needed for synchronization. Data Processing Agreement (DPA) available.
Free 14-day trial – full feature set, no credit card required.