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Though this app appears to be overly simplistic when loaded, its unique feature is made apparent when used in a dark room -- like when you're going to sleep, for instance. When you open the app, it plays the sound of a thunderstorm, along with displaying blue color hues on your screen that intensify as the sound of the storm intensifies. The effect it creates, when laying your iPad down flat, is similar to real lightning that brightens up your room when it strikes. Lay your iPad flat on its back, turn the app on, and get to relaxing!