Connecting the calendars
Guides for connecting the calendar your meetings actually live on, so 42min hides the times you're busy and writes every new booking straight back.
Connect Apple iCloud Calendar
Conflict checking and write-back for the calendar on your iPhone and Mac
Connect iCloud with an app-specific password and 42min reads your busy times, writes bookings back, and hides slots rather than risk a double booking when Apple can't be reached.
Connect a CalDAV calendar
Zoho, Fastmail, Yahoo, Yandex, and any server you host yourself
One open standard behind one connect dialog. Sign in with an app password, tick the calendars that should block your time, and pick where new bookings are written.