Delete your YourBeats account
This removes your account and everything it holds: song records, runs and progress, achievements, your handle, avatar, privacy choices, your song library and your sign-in. It is immediate and cannot be undone. Some things stay, such as a note that a deletion happened (with a scrambled form of your account's ID), songs you added to the catalogue and reports you made (no longer linked to you), and our email system's record of the codes it sent you (the address and when, never the code).
Played as a guest, without an email? A guest account is deleted in the app, on the phone you play on: open YourBeats, then You, then Privacy and account, then Delete. It removes that guest account and everything it holds, as above. This page needs an email, so it cannot reach a guest account.