Do I have to sign in to Facebook to Race With Friends?

No! Signing in to Facebook allows you to invite your Facebook friends to a lobby easily, but it is not required to race with your friends.

When you create a lobby, there is a lobby code in the bottom-left hand corner of the screen. Tapping this button will allow you to share the code with your friends through Messenger, Whatsapp or other communication programs.

Alternatively, you can tell your friend the code, and they can manually enter it in the Race With Friends landing page.