You can sync your progress by linking your Game Center account on iOS or your Facebook account to the game.
You can log in to Facebook:
  • Through the settings window;
  • Through the Diary in the Friends tab;
  • Through a win window;
To log in to Game Center:
  1. Open the settings of your device
  2. Tap on the Game Center
  3. Tap Sign in...
  4. Select Sign in from an existing Apple ID
  5. Enter your Apple ID
  6. When you return to the app, synchronization with your account will happen automatically.
  7. If the account already has progress, then when synchronizing, you will be given a choice between the current progress and the progress on the account