You can save your game progress by connecting it to Facebook (Android and iOS devices) or Apple ID (iOS devices only). To connect your game account, tap the cogwheel button on the screen's upper right side. Once the game settings window opens, tap the ‘Connect’ button and pick the option you prefer most.

Connecting your game to other save tools on different platforms does not save your game progress!

IMPORTANT: Please remember that the game account can be connected only to a single means of backing up game progress.