Just a solid white screen, with additional colors available via the touchscreen. I use it as a flashlight. Slide your finger around in the top third, middle third, or bottom third of the screen to change red, green and blue components of the color. The app can be set to keep the screen on, to automatically increase the screen brightness to maxium, and to only show white (disable color changes). 只是一个纯白色的屏幕，与其他颜色可通过触摸屏。我用它作为一个手电筒。 在前三名左右滑动手指，中间三分之一，或者屏幕下方第三个改变颜色的红色，绿色和蓝色分量。 该应用可以被设置为保持在屏幕上，以自动地增加屏幕的亮度，以maxium，并只显示白色（禁用颜色的变化）。
v4: Added settings screen with options to control auto-brightness, keep screen on, and only show white. v3: Removed title bar for even more whiteness. v2: Automatically increases screen brightness to max when opened, restores original brightness when closed. v1: Initial release.