Free scanner radio lets you listen to police and fire departments and noaa weather of your region on your phone. It provides live audio of fire scanners, weather radios, and amateur radio repeaters from the United States.
Features:
* Add scanners you listen to the most to your Favorites list for quick access.
* View the top 50 scanners that have the most listeners
* Browse thru newly added channels
* Broswe thru alert channels
* Browse the directory of scanner feeds by location or by genre (public safety, weather, railroad, etc).
* Browse thru all the available NOAA weather radio channels.
* Configure alerts to have the app notify you when lots of people are listening to a scanner (indicating that something big may be happening).
* Sleep timer
Explanation of why various permissions are needed:
The "Modify global system settings" permission is needed in order for the app to be able to change the device's "Wi-Fi Sleep Policy" to "Never" (but only with your permission). When you run the app, it will check the setting and ask you if you would like for it to be changed to "Never" (if it's set to something else) so that the scanner audio won't be interrupted if the screen turns off while you're listening over Wi-Fi.

Some popular channels are listed below.
Chicago Police
LAPD - Code 3/Hot Shots, Air/K9 and Van Nuys/Valley Traffic
San Diego Police Dispatch
Phoenix Police
Denver Police, Fire and EMS
Waterloo Regional Police
Newark Police
Bayamon and San Juan Police
City of Tulsa and Rural Police, and Fire, Tulsa County Sheriff
Ingham County Public Safety
Multnomah County Sheriff and Portland Police
Memphis Police and Shelby County Sheriff
Amateur Repeater Los Angeles Area 147.435mhz
Cincinnati Police
Houston Police
Northwest Ohio Digital and MARCS
Fort Worth Police Dispatch
Sacramento County Sheriff and Sacramento City Police
Des Moines Metro Police
Sedgwick County Law Enforcement
Cleveland Police
City of Buffalo Police and Fire
Madison Police
Allen County Public Safety
Tucson Police and EMS
Minot Police, Sheriff, Fire, and EMS
Stockton Police
Modesto Police Dispatch channel 1
San Juan and Ponce Police, Fire and EMS
Black Hawk County Police, Fire, and EMS
Albuquerque Police and Bernalillo County Sheriff
Aurora Police and Fire
City of Pittsburgh Police, Fire, and EMS
Anne Arundel County Police, Fire, and EMS
Akron Police Department
Amarillo Police and Fire, Randall and Potter Counties Sheriff and Fire
Hunter Valley, Port Macquarie and Coffs Harbour Police
NYPD Special Operations Division and Traffic
Logan Police
Evansville Police and Fire Dispatch
Philadelphia Police - Citywide
Flint Police and Fire, Genesee County Fire Dispatch
Westmoreland County Public Safety
Oxnard Police
Detroit Fire Department
San Bernardino County Fire and Sheriff System 1
Omaha Police
Little Rock Police Dispatch
Butler County Sheriff, Police, Fire, and EMS
Allen County Public Safety
NOAA weather channels