You can control whether or not your app will integrate with the calendar by checking the Enable Calendar option. If checked, any time a new data item is entered and saved it will be added to your device's calendar unless "Bypass Calendar" is checked notifying the app to NOT add the item to the calendar when saving the data entry.
If Enable Reminders is checked and the date is in the future, a reminder will be set. The reminder interval can be specified in minutes in the "Reminder (mins)" field. The default is 120 minutes (two hours).
If you have multiple calendars you can specify which calendar Logbook Pro records the events to. Tap the setting and then select the calendar from the list of calendars available.