Horrible in ios7
Doesnt work for me at all as an IAA in ios7. Wont work with IAA for Auria or Audioshare, or anything IAA. This is pretty darn pathetic for an FX only app. It does work with audiobus, but its a pain to use that just for a vocal effect in a larger mix. I do not recommend this at all.
Ikesanf about
Voice Rack: FX - Vocal Effects Processor