I just bought a new car stereo and it has an AUX jack but I did some searches and people have said it doesn't work. They were old posts though so I don't know if things have changed. Is there somethnig that I need to buy to make it work or is there tlike an app or what? I was planning on just buying an AUX jack but I dont want to be disappointed and go back to return it(only store is really far)