Integrations

Apple iCloud Calendar is not supported yet

Caltsu syncs Google and Microsoft calendars today. Email support@caltsu.com to ask about Apple support.

Email support

What works on Apple devices today

A Google or Microsoft account added to the Calendar app on iPhone or Mac
Yes. Events you create there are stored at Google or Microsoft, so Caltsu sees them and blocks the time in your other calendars.
Caltsu blocks in those same accounts
Yes. They show up in the Apple Calendar app like any other event.
A calendar stored in iCloud
No. Caltsu cannot read iCloud calendars or write blocks to them yet.

If your events live in Google or Microsoft, you can start now

Caltsu copies the time of each event to your other calendars as a Busy block that names the source calendar. Titles, attendees, locations and notes stay in the source calendar.