Unknot: Arrow Puzzle · developer: Vectorinc
You only have an Unknot account if you signed in with Google or Apple. Playing without signing in stores nothing in your name, so there is nothing to delete.
If it asks you to sign in again first, that is a security check by Google or Apple; sign in and tap Delete account once more.
If you no longer have the app, email vectorincng@gmail.com with the subject "Delete my Unknot account" from the email address of the Google or Apple account you signed in with (for Apple's "Hide My Email", say so and include the relay address if you have it). We delete the account within 30 days and reply to confirm.
See the full privacy policy.