Not much, just a music visualizer. There is a built in pause feature (Press "P"), but that's really it. Feel free to use this in your projects if you like. This does have a drawback. Because it uses the microphone, sounds you make affect the visualizer. Just try to put your device on a flat surface and watch it calmly.
Credit to @EIephant_Lover for the pausing technique Credit to @KrufferWasTaken for the visualizer technique Music: Manganas Garden - Stuck In Nostalgia (Besnine Remix)