Open Integrations in the bookto app and connect the calendar you want booking to use. You can connect Google Calendar or Infomaniak Calendar. The connection is shared at account level; booking uses one selected calendar for your availability and appointments.
bookto checks whether times are busy, but does not read the titles or details of your other calendar events. A confirmed booking is added to the connected calendar when the connection allows bookto to write its own booking events.
Google Calendar
Choose Google on the Integrations page and follow Google's authorization steps. Allow the calendar permissions requested by bookto. Google Meet locations require a working Google Calendar connection that allows bookto to create its own events; see Locations and Google Meet.
Infomaniak Calendar
Choose the Infomaniak connection and follow the instructions in bookto. Infomaniak requires your calendar account name and an app password from Infomaniak's manual synchronization settings. Select the calendars bookto should check for busy time.
If the calendar cannot be checked, bookto shows no open times rather than risk a double booking. See How calendar availability and sync work if no slots appear.