Maybe Uniden could contact the fine folks who make the GoPro Hero 3 action camera for some pointers. They have an app that controls the camera via Wi-Fi that works flawlessly. It will even show what the camera is seeing. Can't go wrong with that.
Now before y'all pile on, I know that the 536HP is a much more sophisticated piece of equipment and the app protocols are probably a lot more complicated and that's why they're running into problems. Just saying that a remote control app can be done.