THIS APP IS FOR AN OPEN SOURCE HARDWARE PROJECT! If I didn't give you one, or you haven't built one yourself, this app won't do much for you.
8BitBox is an Arduino based project controlled by an android phone. It is controlled via Bluetooth, and features a controllable RGB LED and piezo buzzer.
Once connected to the 8BitBox, you can use a progress bar to set each of the RGB levels individually and play music via the piezo buzzer.
There are currently two pre-programmed songs that will play over the buzzer.
The 8BitBox has an NFC sticker in it as well, allowing quick-setup of Bluetooth and automatically storing a favorite LED color.
For app instructions, a list of parts to build your own, the Arduino sketch, and even the source code for this app (everything you need to make your own!), check out http://markslaboratory.com/8bitbox/