There are applications that work on both iOS and Android (both Phone and Tablet), and they manage to sync the data across different devices.
- Are there any frameworks or libraries that provide this sync functionality?
- If not, what are the different options for implementation?
- Can iCloud be used for syncing application data across Android and iOS devices?
No. There are no frameworks or libraries that provide the kind of cross-platform sync that iCloud provides for Apple devices.
No. iCloud is only for Apple devices (as of now, July 2012).