I'm often asked about the logbook flying history. The ezccs logbook pulls paring data from the CCS calendar. The calendar goes back approximately 3 months. That means that is you start using the ezccs logbook today, the app can retrieve data going back about 3 months. I recommend using the Backup/Transfer menu option on the main screen of ezccs and save the logbook data to at least one other device or email a copy of the database to yourself.