You can integrate Cliniko with a google calendar (Gmail account) and then sync your Gmail account’s calendar with your Clearhead calendar. Your Google calendar therefore becomes the source of truth which both Cliniko and Clearhead calendar syncs to.

The instructions to sync Cliniko to your Google calendar can be found here:  https://help.cliniko.com/en/articles/1147106-connect-cliniko-to-an-external-calendar#google-calendar

You can also do the same for Microsoft calendar the instructions can also be found through using this link: https://help.cliniko.com/en/articles/1147106-connect-cliniko-to-an-external-calendar#microsoft-outlook-calendar