Game progress is stored locally on your device or in a cloud service. When you connect the game to your Facebook (Android and iOS) or Apple ID (iOS only), your progress will be saved online, allowing you to recover it by logging in to the same account in case of game reinstallation or when the device is changed.

Please remember that single game progress cannot be simultaneously linked to Facebook and Apple ID. 

The game's ‘Sign in with Apple’ feature is available on devices with iOS13 and above; however, it does not include social features available on Facebook connections, such as level-specific leaderboards or profile pictures.