[DuPiMan]

FTP and SQLite would have been totally acceptable tools to use, and are commonly used for this kind of project. Firebase however did for us what FTP and SQLite would have done, but also did more. Using Firebase meant that syncing data between all apps, and the server, was something that we never even had to think about. It also meant that we never had to worry about what to do when an app was offline. The list of conveniences goes on. Good question.