Occasionally, your watch says "login on phone" or "sign up premium on phone", even though you already did. This is due to unreliable phone watch communication. To fix:

1. Make sure you are premium on phone (yellow checkmark next to your profile picture), and logged in (name is not "LOGIN" before the profile picture).

2. Reboot watch (this resets the communication link between phone and watch)

3. Click "start game" on watch (this queries phone for the latest status)