When you sit down with your Banzarb developer for a planning session, it is important to know what your primary service is. For example, if you are a supermarket manager, then your main service is selling grocery items to your community. Your iPhone app has to revolve around that primary service but can improve on it as well. So your app should keep loyal customers abreast of the changes in prices of grocery items, new promo programs that they can get involved in, and even items that are sold on a sale or combined with other items for a dual marketing push.