We sync availability, not data. Your medical appointments stay off your work calendar. "Busy" is all they see.
Instant updates. No polling delays.
Updates flow both ways instantly.
Google, Outlook, and Apple support.
Set and forget background operation.
We never see your passwords.
"I manage 3 different client Outlook accounts and my personal Google calendar. Caltsu stops the overlapping meetings completely. It just works in the background."
"I tried manual syncing for years. Now my therapy sessions just show as 'Busy' on my agency's calendar. Nobody asks questions. Setup took exactly 2 minutes."
"Other tools always leaked my personal event titles or broke down constantly. Caltsu's webhook approach means my schedule is accurate the second someone invites me."
Start for free. Upgrade when you need more power.
Caltsu uses official APIs to connect to your calendars securely. When an event is created in one, we automatically add a 'Busy' block to the other. Deletions and updates sync in real time.
Yes. We only sync 'Busy' time blocks. Your private event details, like names and locations, never leave their original calendar.
Google Calendar, Microsoft Outlook, and Apple Calendar. You can sync any combination of these.
It means events flow both ways. If you add an event to Calendar A, it blocks time on Calendar B. If you add to B, it blocks time on A.