But it's free - with ads - and gives you a way to find stations with real disc jockeys that are playing music you like.
You can even sometimes catch a song before it starts.
CEO John Donham says that's because TuneIn gets the song data from traditional radio stations, while the digital streams are fed to TuneIn a few seconds later.
After spending an hour or so testing a pre-release version of the updated app on an iPhone, I got a mix of songs starting anywhere from 20 seconds to more than a minute late. A couple times, I began listening to the radio station well before the song began, so I could catch the whole thing. Sometimes a 30-second digital audio ad - in most cases for GEICO car insurance - made me miss more of the song than I would have otherwise.
Picking songs like Mumford & Sons' "I Will Wait" and David Bowie's "Let's Dance," I found myself tuning into stations based all over the place, such as Q-99 in Roanoke, Virginia, or Mix 105.3 in the Tri-Cities area of Washington state.
TuneIn, with 50 million active users a month, is similar to a raft of free radio services like Pandora and iHeart Radio, although it feels more like traditional radio because you get a heavy ad load by tuning directly into the on-air broadcast.
Still, with a host of new social sharing features and the ability to follow stations, programs and podcasts, the revamped service is a nifty take on modern radio.