Emergency Scanner is a free mobile application for Android that allows you to listen to real-time police radio feeds, fire departments, NOAA severe weather conditions, and emergency events from the United States. The application features a directory of scanner feeds of police, public safety, weather, and railroad, among others.

One of the standout features of Emergency Scanner is the ability to configure alerts to notify you when lots of people are listening to a scanner, indicating that something big may be happening. Additionally, the app includes a sleep timer and a favorite folder to store the channels you like to listen to most. You can also view the top scanners that have the most listeners.

Emergency Scanner is an excellent tool for anyone who wants to stay informed about what is happening in their community in real-time. Some of the popular channels available include Chicago Police, LAPD, San Diego Police Dispatch, and Phoenix Police, among many others.