I've used SQLite for a distributed project lately where different offline teachers in rural schools would back up their app data to a thumb drive as file databa

I've used SQLite for a distributed project lately where different offline teachers in rural schools would back up their app data to a thumb drive as file databases, take it back to a town with connectivity and upload that data to the app server, so they'd get extra functionality and updates. It was incredibly straightforward to do and worked wonders!