I'd like to use my old iPad 3 as a media server and control it with my iPhone 6

[stephen]

Are you aware of any good app that accomplishes this? My primary interest is playing Apple Music.

I know Apple Remote only controls an AppleTV or iTunes library on a Mac.

A quick review only reveals a couple of 1-star rated programs that are said not to work.

What's appealing about this setup as opposed to a Bluetooth adapter streaming my phone, etc. is the higher fidelity of a direct wired connection from the music source to the Onkyo mini-amp.