Some of this has been covered in other threads. @stevehuff has an
extensive writeup that you can glean some info from here:
but he's taking things a few steps further with the LPS and reclocker. Your question about using Innuos with iPeng is valid. I started using Orange Squeeze with my Zenith which is a similar control app used for android devices. It presents only the most basic control functions (play, pause, stop) and the ability to manually create a play queue but no saved playlists (not sure if iPeng is more sophisticated). I would definitely suggest you understand your current and future use case and requirements because the control app alone could be a non starter for you. If you plan on using Roon, Innuos integrates cleanly but you have to be good with the yearly ($119) or lifetime ($699) subscription. To Roon or not to Roon….that is the question!