The term iCloud regroups several technologies. As far as I know the simplest one a basic key-value store works very well, I use it without any problems. However

The term iCloud regroups several technologies. As far as I know the simplest one a basic key-value store works very well, I use it without any problems. However, last year I tried to integrate CoreData syncing through iCloud in one of my apps and I couldn't make it work reliabily, I spent a lot of times I tried many things, but usually there always was some irrecoverable corruptions that ended-up preventing any syncing. I never shipped this code, I was too afraid, it was too brittle. I haven't retried since. I heard the situation has improved but I don't know for sure, it was such a nightmare that I simply avoid to spend any more time on this api. Edit: I found this quite recent post with similar issues http://www.jumsoft.com/2013/01/response-to-sync-issues/ http://www.jumsoft.com/2013/01/response-to-sync-issues/