TLDR:
you create an account, Chess Reps stores your email address to identify it. You will not receive any emails by Chess Reps. You can delete your accounts anytime you want. After an account is deleted, all information tied to it will be deleted aswell. Chess Reps is supported by AdMob ads.
Full privacy policy: here
TLDR:
Please use the app like it was intended to be used.
Full terms of service: here