This app is used for connecting with Bluetooth LE (4.0 or above) devices. By clicking on the Bluetooth icon at the bottom of the main screen, you can see the list of all available bluetooth device surrounding your iOS device (make sure that the Bluetooth functionality of your device is turning ON). Select the device (the FancyLight controller, named FancyLight) you want to connect. Now you are able to connect and control your LED sticks which are plugging in your controller. Enjoy the light show!