To sync your Google Calendar data between Google cloud and the Android calendar storage, you need the Google Calendar app installed. (Early versions of Android included a Google Calendar sync adapter, but this was moved to the Google Calendar app, to be able to update via Google Play. Alternatively you can configure Google as CalDAV calendar, but this has several limitations.)
The Google Calendar sync to Android has some limitations:
- Past / future events are limited to 12 months. You can view all your data online in Google Calendar in a web browser. To sync all past events to Android, please see: (Past / Future) Entries are missing in Google calendars.
- Google calendar offers 11 event colors.
- The sync of Google Drive attachments is not supported natively by Android (the Android calendar system knows no file attachments), but this is offered by aCalendar itself and can be activated per calendar in the calendar list.
Please see also: Problems with Google Calendar Synchronization