(To be able to connect My Hospital to Amazon GameCircle service, you'll need My Hospital version downloaded from Amazon Appstore.)
Amazon GameCirclce service is needed to track your in-game achievements.
For cloud saving, you still need to log in with your Game Center/Google Play account.
To connect My Hospital to Amazon GameCircle:
1. Launch the game and open Settings menu.
2. Next to Facebook Connect button, you'll see Amazon GameCircle button.
3. When you click Amazon GameCircle button, you'll see notification that you are currently logging in as Guest.
4. You can stay logged in as Guest or you can quickly tap this notification when it's visible to log in with your own Amazon account credentials.