Integrations

Kalender Sync connects the calendars you already use. No new app, no switching — just clean availability across all providers.

Google Calendar

Connect Google Workspace or personal Gmail calendars via OAuth. Real-time sync via webhooks.

Microsoft 365, Outlook.com and Exchange Online. No add-in needed, no admin access required.

iCloud calendars via CalDAV and app-specific password. Works with iPhone, iPad and Mac.

Swiss calendar provider with CalDAV support. EU data stays in the EU.

Subscribe to any external calendar via iCal URL. Read-only, but automatically kept up to date.

Google and Microsoft via OAuth, iCloud and KSuite via app-specific password. No admin needed.

Choose source and target calendars. Define whether only availability or also titles should be synced.

Changes are picked up in real-time via webhooks. No manual maintenance, no tab to keep open.

Every provider can be synced with every other — in both directions.

Google ↔ Outlook Google ↔ iCloud Outlook ↔ iCloud Google ↔ KSuite Outlook ↔ KSuite iCal Feed → Google iCal Feed → Outlook iCal Feed → iCloud

Do I need admin access to connect calendars?

No. Google and Microsoft connect via OAuth. For iCloud you need an app-specific password from your Apple settings.

What permissions does Kalender Sync request?

Only calendar read and write access. No contacts, no emails, no files.

Can I connect multiple accounts from the same provider?

Yes. You can connect e.g. two Google accounts and one Microsoft account at the same time.

Are my credentials stored?

For Google and Microsoft we use OAuth tokens, not your password. For iCloud/KSuite, app-specific passwords are stored encrypted (ChaCha20-Poly1305).

Missing your provider?

We're continuously building new integrations. Let us know which calendar you need.