If you can no longer open the app, email [email protected] from the email address of your account with the subject "Delete my account". We delete the account as soon as we have verified the request, and no later than 30 days after we receive it.
Once the deletion is final (promptly after we verify an Option 2 email request, or 30 days after requesting it in-app for Option 1 if you don't sign back in), it permanently removes your login, your profile, your card collection, your marketplace listings, your messages and any files you attached to them, your Contact Methods, and your friendships. If you signed in with Apple, deleting your account in the app also revokes U.C.M's access to your Apple ID sign-in.
We keep only what we are legally required to keep, or need to resolve a dispute, and only for as long as that is necessary. Your payment records are held by Google Play or the App Store, not by us. Deleting your account does not cancel a subscription: cancel it in Google Play (Payments & subscriptions > Subscriptions) or in your Apple ID subscriptions first, so you are not charged again.