Google Calendar integration is a read-only sync between acreom and your Google Calendars. For this to work acreom requires two access permissions:
View and edit events on all of your calendars
acreom requires access to view and edit your events in order to display them in the app and allow editing the events.
See, edit, share and pemanently delete all the calendars that you can access using Google Calendar.
This permission is required to accurately reflect any changes to your calendars.
Your calendar data is safely stored on Google Cloud servers which acreom uses on synced vaults. The data is deleted upon the removal of the Google Calendar link, acreom vault or when there's no activity for extended period of time.