Black Screen is a mobile application that allows users to play videos and audio with the screen turned off. This feature helps to save battery life on AMOLED and OLED devices as the screen is completely off when displaying black color. The app can be used to watch music videos, listen to podcasts, record videos, take selfies, and more. It also has a floating button that allows users to quickly turn off the screen and unlock it by tapping on it. One of the main benefits of using Black Screen is its ability to save battery life on AMOLED and OLED devices. This is because the screen is completely off when displaying black color, which is the color used by the app. This feature is particularly useful for users who enjoy watching videos or listening to audio for extended periods of time. In addition to its battery-saving feature, Black Screen also offers a customizable interface. Users can choose from a variety of options, including an always-on display option and a pure black option. The app also has a floating button that allows users to quickly lock the screen and unlock it by tapping on it. It is important to note that Black Screen is not a lock-screen app. Instead, it is a black screen overlay that is placed on top of the app that the user is currently using. This helps to save battery life on AMOLED devices, but it does not provide any additional security features. Overall, Black Screen is a useful app for users who want to save battery life on their AMOLED or OLED devices while still being able to enjoy videos and audio. Its customizable interface and floating button make it easy to use, and its pure black option ensures that the screen is completely off when displaying black color.