Fulscrn Free is a free Android app developed by GuoPing He that lets you use every pixel on the screen to provide a better experience for reading books, watching videos, and playing games. With the ability to force all apps to Immersive Full-Screen Mode, it hides the status bar and navigation bar to give you an uninterrupted view of the content. The app also includes a Notification Control Bar and Material Design that enhances the overall user experience.

However, there are some limitations due to the system. When the fullscreen mode is on, the back and keyboard are disabled. This can be inconvenient for some users. The app also requires network permissions, which are only used for displaying ads.

Overall, Fulscrn Free is a useful app for those who want to enjoy a better viewing experience on their Android device.