Use APKPure App
Get Vacant FM Locator old version APK for Android
Find an empty FM station for a satellite radio or bluetooth to FM transmitter.
!! This application does not turn your phone into an FM transmitter !!
It is meant to be used with a separate FM transmitter device.
It acquires your approximate location and then launches the website www.radio-locator.com.
The web site provides a list of unused FM frequencies that you can use.