FierceMobileContent Editor Jason Ankeny every month looks at the market's most innovative and noteworthy iOS and Android apps. And every month he ranks the industry's top apps, highlighting the immersive mobile experiences that are entering app stores each day. The top app for May is Touch Press' Beethoven's 9th Symphony, which is arguably the most comprehensive app ever devoted to a single piece of music. The app, focused on composer Ludwig Van Beethoven's ninth and final completed symphony, brilliantly leverages the interactive possibilities of digital multimedia to redefine the parameters of music scholarship. The app features four different recordings as well as the ability to view Beethoven's original manuscript. Find out about the rest of the best apps from May in this special report.