AOL Radio 4

This is a handy free app that lets you stream lots of terrestrial, commercial radio stations from all over the USA through your iPhone. So, you don't need a portable radio to listen to the radio. Most of the time I listen to my own music and podcasts on my iPhone but this app is really handy if you want to listen to live broadcasts of news or sports wherever you happen to be. Four stars instead of five because the radio stations all carry annoying commercials.