Hi - I am getting an app built. I want to offer a daily in app upgrade purchase (the full app is distributed free but there will be an offer to a paid in app upgrade). The problem is this, I want the upgrade element to be updated daily and then the clients select it from their dashboards but this incurs a recurring charge each time they select the upgrade (usually on daily basis, excluding Sundays) I cant seem to get any sense from itunes, has anyone any ideas regarding a solution?