Can it do 'offline first for couple of months'?

Use case I'm thinking about:

- At first the mobile app has no account, db is used without online backend.

- Then user pays for premium features including online backup/sync.

- This user then is created and all the data will be put in the online db and syncs, etc.

- No local SQLite db or anything needs to sync, because you have this offline first database, that can handle offline only.

This seems like an obvious use case to me, but have had trouble figuring out best path forward.