In a past few days, I attended Barcamp Saigon event and had a Cloud computing session at there. I have uploaded it to facebook: http://facebook.com/mroom.group. And all source code for both iOS and Android are here:
iOS: https://github.com/mroomsoftware/iOS-Cloud-Sync
Android: https://github.com/mroomsoftware/Android-Cloud-Sync
I am working hard to develop and continue fix bug. I will update a new version ASAP