The app also will adjust your music stream volume level when spotify is playing music vs not playing music.. If you're having trouble hearing your nav voice when spotify stops playing this app can adjust it automatically. Just turn down the music volume level.
We do not host Bluetooth Widget Audio on our servers so we did not scan it for viruses adware spyware or other type of malware. This app is hosted by Google Play and passed their terms and conditions to be listed however we still recommend caution when installing it.
Good luck