The Groove Player app can store thousands of beats and percussion patterns, allowing users to create their own beats or to purchase beats by some of the world’s greatest drummers and percussionists, including Kenny Aronoff, Alex Acuña, Marco Minnemann, Steven Wolf, Eddie Bayers, Danny Seraphine, and Billy Martin. Users can control tempo, time signature, and drum and cymbal sound levels, and they can post their creations to Dropbox or similar cloud-based storage websites. The app sells for $2.99 and is available at the iTunes App Store.,