Sign in
Sign in and your claimed list follows you to every device. Connect a store and the board marks the games you already own, so you can skip them.
No password is created here and none is stored — you sign in at the service above and we are told only who you are. Steam gives us your profile name and nothing else: no email address, and no ability to buy, claim or change anything on your account. We can only read which games you own, so the board can tell you what to skip.
Your claimed list moves to your account and follows you to any device. Whatever this browser has already saved is kept and merged in, never replaced.