Scanner Radio Pro (Android) app for $0.99

Listen to live audio from over 2,500 police and fire scanners, weather radios, and amateur radio repeaters from around the world--with more being added daily. Configure alerts to have the app notify you when lots of people are listening to a scanner--indicating that something big may be happening. Volunteers provide all the audio using real scanner radios. If your area is not available, see the menu in the app for information on how to get it added.++