Earlier quoted context omitted.
> Since SQLite is used extensively in every smartphone, and there are more than 4.0 billion (4.0e9) smartphones in active use, each holding hundreds of SQLite database files, it is seems likely that there are over one trillion (1e12) SQLite databases in active use. Sounds reasonable to me.
Hundreds of SQLite files? In active use? Unless iOS itself spawns a few hundred instances and actively uses them all the time I have a hard time thinking of what would use so many databases, much less that they’re actually in active use.
The OS does do that, on behalf of applications CoreData or those using SQLite directly.