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.
This makes it ”easier” to play ipad instruments (Tactile Surface)
Well I'm not 100% sure since I haven't bought it and tried it myself - yet...
But from the looks of it playing keyboard chords and tapping out beats will be more fun and easier with a tactile surface, don't you think?
Check out: https://www.tacscreen.com/ It's also removable.
Plan to order sooner or later and try it. Maybe many others here will do the same.