As we all know these units don't sport voice control. I found a way around this using the iPhones built in voice control. If you hold the home button for a few seconds to activate voice control as you normally would on the iPhone the voice control pops up and uses the car speaker and microphone. Just say your command at this point like call "foo" and it will call. I have found this pretty handy. What would be cool is if Pioneer made a way to trip the voice command by holding the center button on the app radio.
The more and more I use the app radio the more I see I am not giving up functionality but just shifting the functions from one device to another.