This app is the worst over bluetooth!! It just downloaded the same song 793 times in a row  consuming 4GBs in background usage!!! That alone just cost me $30 with Verizon. I guarantee that it's due to the newest Android software update that was just pushed out this morning. In addition  it automatically starts up upon bluetooth connection no matter what settings are chosen. I've used this app with different Android phones in 3 different cars and it does the same thing almost every time. This app will screw you badly with your cell provider if you don't turn off background data.....which renders the app pointless. Good luck!!
August 13 2015