This is utility code for using SQLite via FMDB. It’s not a persistence framework — it’s lower-level.
It builds as a couple frameworks — one for Mac, one for iOS.
It has no additional dependencies, but that’s because FMDB is actually included — you might want to instead make sure you have the latest FMDB, which isn’t necessarily included here.
The main thing is RSDatabaseQueue, which allows you to talk to SQLite-via-FMDB using a serial queue.
The second thing is FMDatabase+RSExtras, which provides methods for a bunch of common queries and updates, so you don’t have to write as much SQL.