Users who have already created an account can delete their account from within the application in the following ways.

Launch the application.
Tap the settings icon in the lower right corner of the screen to open the settings screen.
Tap "Account" to open the Account screen.
Tap "Delete account" to open the Delete Account screen.
Tap "Delete account" to delete the account.

If you delete your account, you will not be able to recover your data. Please be careful when pressing the account deletion button.