Flashlight by Whistle app provides a easy way to turn on flashlight by whistle. Just with a whistle, you can active and turn on flashlight of your phone. Even Flashlight by Whistle can help you find your phone in the dark by a whistle. If you are in the dark, and you can see something, just a whistle, the phone will turn on flashlight and brighten the dark. If you can't find my phone, just use the whistle to flashlight on app, when the flashlight is on, you can find your phone. The whistle to