Melodynamic Studios / J ISAAC has released Melodynamic Studios App 2, an iOS application designed to challenge producers and composers on the go, provide free lyrics to read and sounds to listen to.
The trivia game inside this application is designed to challenge the producers brain. Questions cover "from the wealthiest DJ to the order of orchestral periods". There are also instrumentals and the ability to discover new art.
This is a free application, and available for iOS devices (iPhone, iPad).