Hi all, This is my first time implement In-App Purchase in my education app. In my Menu interface, it consists 4 levels button and a "More Levels" button. When click one "More Levels" button, a store interface which consists "Buy", "Restore Transaction" button, product description and price will be displayed. User can purchase once to get all other levels by click that "Buy" button. My question is after the user purchased all the enhanced levels, should I still need to display "More Levels" button? Since they have done the purchased, is the app still need display "More Levels" button and display store interface once click it? Any suggestions and comments are welcome. Thanks.