The features of app are:
1. Backup of contacts to SD card, Google Drive, DropBox, OneDrive or Send by email.
2. Restore of SD card, Google Drive, (iCloud), DropBox, OneDrive.
(*iCloud) - app that collect data from icloud and save them on a android device. (Sync for iCloud Contacts).
3. View Backup.
4. Delete Backup.
5. Delete all contacts from your smartphone. (But before requiring a backup is done)
6. In-app billing version 3 API (Version paid remove ADS)
7. Button "like" Facebook