This app works together with the WOODROCKER guitar. The WOODROCKER guitar doesn't have strings, it's a simple piece of wood with a holder for your smartphone. Once you have buckled up your phone, launch the app and become a rock-star immediately! The Woodrocker app features five play-modes with different sounds and playing styles. Simply swipe the buttons and tilt the guitar to change harmonics. Song mode features various ready-to-play songs like "Happy birthday", Wedding March" and "Jolly Good Fellow".