I checked which version of Siren I have on my Android device this morning, and it says 1.0.1. Does Uniden have any plans to improve the Siren app, or have they written it off? Because of the audio delay problems, I simply use my old Android cell phone as a remote head to operate the scanner and listen to the audio directly from the 536HP itself. The Siren app continues to be rather undependable, unfortunately. It may work for several hours, or it may work for only five minutes before I have to cycle power on both the scanner and the Android device (I usually run it in AP mode). Overall I love the 536HP but the SIren app is a let-down and I wish that Uniden would issue an update for it.