Your phone will blink in the rythms of music with the camera's LED flash light (can be disabled in settings) and with funky colors on the screen.
App is very lightweight and easy to use. In music mode you can easily adjust sensitivity and frequency and your phone will perform well as a light show at various volumes and music genres.
In strobe mode you can easily adjust blink duration and frequency and turn your phone into the strobe light.
In manual mode you can use your phone as a torch light (on/off) or manually insert some crazy light effects.