Here I will explain 5 Best Police Scanner Apps for Free. People Use Police Scanner Apps for free all kinds of reason. Police scanner apps for free helps some stay up to date on crime in the area while others Use it for entertainment. Here I will list the 5 Best Police Scanner Apps for Free. In this quick list, we’ll round up the best police scanner apps for free. Before we begin, it’s important to note that having and using a police scanner is illegal in some places so be sure to check your local laws before downloading any of these so you don’t get yourself into trouble. Let’s begin.