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 StoreAudiobus is the app that makes the rest of your setup better.
Devs - Grid Based 'Loop player' grid style AU 'effect' would totes win z hearts
With all the cool drumsynths and groovebox style sample drum machines, a slick little AU effect to record and mix them would really fly me thinks...
Do a few tracks in there, max 8... where you simply record a fixed bar length of whatever little thing you have going in a host like Aum or Ape or AB etc, then it auto loops, has mutes and a few simple fx per track... then you could just build up a thing from scratch, and then save it as a session or whatever, with 'stem' style export for deeper editing elsewhere. No brainer insta buy for a lot of people I think. Cheers.