For Apple Users:

1. Make sure you are connected to the internet.
2. Ensure you have the latest version of the game.
3. On the first screen (the one with the "PLAY" button) tap the cog in the top left corner of the screen. This will bring up the OTHER SETTINGS screen. Now select the 'Sign in with Apple' button.
4. You will then be asked to link Hungry Dragon to your Apple Account.
5. Once you have linked Hungry Dragon to your Apple account cloud save will be activated.
6. If Cloud Save has been successfully activated a cloud with a green tick will appear on the top left of the first screen.

For Android users:

Since Facebook sign-in function has been removed from the game permanently, from now on, all Android users will only be able to save their game progress locally.