This is just a simple tool to show how iBeacons services work. You will need to have two devices with this app installed in order to use it.
From one device, launch the app and tap on "Broadcast" and flip the switch to begin Broadcasting.
From another device, tap on listen, then watch the distance change as you move towards and away from the broadcasting device. Also notice that the image changes, based on how close you are to the Broadcaster.