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.
Most obscure iOS app that you love? Hidden Treasure Apps Thread
I have many apps that everybody knows about and use like BlackHole by Eventide (for a reason because that’s a very good reverb and everybody should know about it) but I also have some hidden treasure that nobody seems to use like Concentric (free). Its an original rhythm tool.
What are the unknow gems that everybody should know about?