The Roland GO:Mixer is a 5 channel smartphone interface. We have one now we have tested with V-Drums, an iPhone, and Garage Band. Its pretty much plug and play and you can record Vdrums in 2 channel audio right into Garage Band. You have more inputs as well. We have tested with bass guitar as well and it worked great. This is great for hooking up any gear you might already own to your smartphone for recording. Comes with connection cables for both Android phones ( micro-USB ) and iPhone ( lightning ) - see pic.
Works with free Virtual Stage Camera app