For my apps Lil Todo, ForeverList/Nested Notes, and Little Phrase Book, I created a simple database system that can be synced easily across multiple devices using a cloud store like Dropbox. Well, I’m happy to announce that I’ve been working on generalizing the database/sync engine for those apps and have opened sourced it.
Check out my new Swift-based SlouchDB. It’s a decentralized, syncable journal-based database meant for single-user, multi-client scenarios like the apps mentioned above. You can use it for Mac and iOS apps! It’s available as a CocoaPod, so you can easily consume it that way as well.