I was wondering, does anyone know if there are any apps out there that runs on blue tooth (ie not via usb) that works like android Auto, like a UI on your cars radio screen? It doesn't have to be advanced, as long as it can support music.
The UI on the car's screen is as much a function of the car's radio as it is a function of the phone. The radio needs to have the accompanying software. You can get devices to plug into your vehicle that will give you a pseudo-wireless Android Auto experience. They emulate the wireless Android Auto interface. I don't have experience with any so I can't make a specific recommendation.