gcal-sync is a personal tool used only by its owner.
calendar.events.readonly).calendar.events).Only event titles and start/end times are copied. Descriptions, attendees, locations, and links are not copied. OAuth tokens and a small sync cache are stored on a private server controlled by the owner.
No data is sold, shared with third parties, or used for advertising or any purpose other than the calendar mirror described above.
Access can be revoked at any time at myaccount.google.com/permissions.