Go to your profile and tap Settings.
Tap Delete Account and confirm.
This can't be undone. You'll lose your purchase history, and you can't create a new account afterwards. See Can I create another account?
Want to change your details instead?
You don't need to delete your account to change your email, phone number or username. Email [email protected] from the address linked to your account and tell us what you'd like to change. See Contact Us for all the ways to reach us.