The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Awesome Apps, LLC:
Turn your device into a powerful live Police, Fire, EMS, Port & Air Traffic scanner. This is the only app dedicated to the city of New York and includes live 24 hour scanners from the NYPD, FDNY, LaGuardia & JFK airports and the Port Authority. The scanners are easy to navigate so you can quickly find your favorite scanner. This app also includes live emergency alert feeds from NYC.