Don't use any smartphone app cuz don't use a smartphone... don't really need one yet.
I love my 708, when working as it should, it is awesome!
Next upgrade will be to 9.2 with ability to run 11.2 when external amp added, something Onkyo/Integra currently does not have available. If they do add this ability I would consider them, but the cost savings (over a Denon 4311/4313 ) would probably have to be considerable given their current track record. This may change with Gibson now involved (on the presumption it is not solely for their distribution abilities)