DataSync

DataSync lets you share application data with other Android devices, so if you have some data and want to keep it synced up between multiple devices, DataSync is the app for you.
DataSync primarily works via your local WiFi network, but lets you sync to the clouds as well to sync your apps when your own network is out of range. DataSync+ even lets you sync using Bluetooth and NFC to further decrease the gap between your devices. By syncing indidivual files instead of entire backups DataSync makes syncing faster and more efficient than ever before.

Features:
• Fast and efficient two-way syncing
• Automatic device discovery
• Cloud integration (Drive, Dropbox, Box and FTP(S/ES))
• Clean, holo-themed UI for all screen sizes
• Background syncing support, with expandable notifications on 4.1+ devices

DataSync+ adds:
• Real-time syncing (sync apps as you open/close them)
• Scheduled syncs
• Bluetooth and NFC support

For updates on development, early access to beta features, support, questions and discussion join the DataSync Google+ community:
https://plus.google.com/communities/109865594715305234423

Coming soon:
- Update user interface
- Merge app and file syncing

Permissions:
ACCESS_SUPERUSER- Copy, replace, and check timestamps of protected appdata
INTERNET - Communicate with other devices and the cloud
BLUETOOTH and BLUETOOTH_ADMIN - Turn on and use bluetooth for P2P communication
NFC - Use NFC to establish a bluetooth connection for P2P syncing
WRITE_EXTERNAL_STORAGE - Cache appdata before transmitting
ACCESS_NETWORK_STATE - Network availability checks
ACCESS_WIFI_STATE - Network availability checks
CHANGE_WIFI_MULTICAST_STATE - Used to get a multicast lock for device discovery
GET/MANAGE_ACCOUNTS - Google Drive integration
USE_CREDENTIALS - Google Drive integration
WAKE_LOCK - Keeping WiFi active during syncs, Google Drive integration
BIND_ACCESSIBILITY_SERVICE - Real-time sync
SYSTEM_ALERT_WINDOW - Real-time sync status popup