Audiobus: Use your music apps together.
What is Audiobus? — Audiobus is an award-winning music app for iPhone and iPad which lets you use your other music apps together. Chain effects on your favourite synth, run the output of apps or Audio Units into an app like GarageBand or Loopy, or select a different audio interface output for each app. Route MIDI between apps — drive a synth from a MIDI sequencer, or add an arpeggiator to your MIDI keyboard — or sync with your external MIDI gear. And control your entire setup from a MIDI controller.Download on the App Store
Audiobus is the app that makes the rest of your setup better.
AudioBus Remote - on Android
Given that AudioBus Remote can work over Wi-Fi and given how affordable Android tablets are compared to iOS products - it would be really cool to be able to run AB Remote on a cheap android device while leaving the sonic stuff to an iPad etc.
I'd rather not have to buy an iPhone or second iPad just to use AudioBus Remote.