Shop Assist ranges and monitors entrances and exits from the zone surrounded with iBeacons. By setting up the coordinates of the zone in settings part, ShopAssist app calculate distances and location of iPhone device so that it can gives the information whether the device is inside or outside the zone(store). This app can be used in stores or zones that has already been using V-Count product counting people. All personnels in shopping center using V-Count product should be able to use this app. The app contains background bluetooth monitoring as a result it increases the drain rate of battery a little bit.