Flashlight Toggle is designed for only one straightforward purpose - to toggle your flashlight on and off with as little interruption as possible. Although most phones provide a flashlight toggle quick setting, this app was designed primarily to use with the Bixby button on recent Samsung Galaxy devices. In Android 9.0 , Samsung made it possible for users to configure the Bixby button to launch an app. Therefore, by using this app, you can have your Bixby button work as a hardware flashlight