Does my Bluetooth need to be turned on to use in car aplication

Does Bluetooth have to stay on phone to use incar??

If you se the device to launch that application when connected to the car, yes. It also matters how you're making the connection to the car - if the connection is through bluetooth then it stands to reason that bluetooth needs to stay on.

If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Android Central.