Free applications seem to do best when they provide a useful tool or a simple fix. Flashlight is a perfect example. The principle is quite simple: brighten up the screen to serve as a pocket flashlight but also as a strobe light during a party. It can flash in a multitude of colors. Strangely, the application cannot be set to launch at its brightest. You have to manually increase its strength after launching it, and if you’re in the dark, that could be tough.