Here is something that some folks may want to try.
EmergencyRadioFree During my 32 year career in law enforcement I never wanted a police scanner at home. 8-10-12 hours a day listening and talking on a radio was enough, but since I retired I may want to listen in, sometimes. There are a number of different scanner apps for the iPad, more for the phones. All of them are limited to what is streamed on line. In my area only the fire departments are available. I suspect that this limitation is the same with all of the different apps, for my area at least. If you are interested in this sort of thing and do not want to pay a lot of money for an actual scanner, as I don't, give this a try. I would not pay for an app as I suspect they all are pretty much the same. Some may have more bells and whistles but........
You can find the free app through the app store on the pad. It is an app for a phone but works fine on the pad. You can listen in while using other apps on the pad.