I wasn't aware of StackMob. They seem to be a bit like Parse but with no API limits on the free tier (Parse's are pretty high) and better Core Data integration but a less rich API for doing things like saveEventually (which I find useful for logging as it should write eventually when network connectivity is restored even if it is the next run of the app).

I'm going to be implementing my own synchronisation code to allow multiple users/devices to edit a document at the same time and I'm not sure either of these platforms (Parse/Stackmob) are really suitable for that and I've read bad things about UIManagedDocument (iCloud with Core Data) and I want to be able to share between users too.

Does anyone know any good tutorials for handling these things well on any of these services or rolling my own server?