To sync calendar data with ATracker data, the user needs to enable the calendar read and write in ATracker->settings and select which calendar ATracker should read/write.
Users can override the calendar write on the task level as well. Please validate the task you want ATracker to write back to the calendar on the task level in the task edit form.
After configuring these settings, ATracker will write task entries back to the calendar for all new / updated task entries after the configuration.
Users can also convert calendar entries into ATracker entries by opening the calendar entry on the Calendar / History tab and tapping the "Convert" button on the top right.
After tapping the "Convert" button, ATracker will try to find a matching task with the calendar title. Users can modify it, change start/end time and duration if needed, and press "Done."
The converted ATracker task entry will co-exist with the calendar entry.