Meet the RemoFinger G: a wireless foot controller that combines with your iPad to help you produce your music more conveniently. You can select presets, start/stop recordings, and turn music pages without having to touch the screen. The RemoFinger G has a wireless range of 20 meters and controls up to 4 channels.
This foot controller is compatible with GarageBand, AmpliTube, and other popular apps. It is available for under $130 at this time.[where to get it]