Cancelling your account.

To cancel your account, simply navigate to the ACCOUNT tab and scroll to the bottom to hit the "CANCEL" text link. 

CANCEL YOUR APP ACCOUNT

From there, you will be asked to confirm. Then you will be sent a PIN to your registered email. Enter the PIN to formally cancel your account.  All of your shares, monetization and access will be deleted and cleared.

CANCELLING YOUR APP STORE SUBSCRIPTION

However, you will STILL need to go into your App Store subscriptions and cancel your subscription independently from your app account, as it is with most apps. 

SETTINGS -> APPLEID -> SUBSCRIPTIONS -> FOURSURE -> CANCEL SUBSCRIPTION