The best thing about TuneIn Radio Pro is its DVR-like functionality. While listening to music, you can pause, rewind, and even record radio content for later playback. Of course, you will be limited by the amount of storage space you have available on your device, but I found that around 3 minutes of radio content took up less than 2MB of space.
Along with the "DVR" controls, the Now Playing screen displays station and track info, as well as album art if it's available. From here, you can also swipe left to related stations, recent stations, Favorites, and a Twitter widget that lets you join in on any social media banter mentioning the TuneIn app. Lastly, there's a share button up top, and in some cases, link to purchase the song on Amazon MP3 (provided you have the app installed).
Some other neat TuneIn features include a sleep timer and an alarm, which you can set to any station. There's also a car mode that gives you basic controls in the form of giant buttons, ready for mashing while your device is docked on your dashboard.
My only issue with TuneIn had to do with its performance. Its streaming was stable, for the most part, but I did experience significant glitches in the updating of track and station info. For instance, I would sometimes see track info for a single song, even after three or four songs passed. It was only after reloading the station that I would see an update. With its incredible selection of AM/FM and Internet radio stations, DVR-like capabilities, and neat bonus features, TuneIn Radio Pro is unquestionably worth its 99-cent price tag. But if you're still not willing to shell out the cents, you can always get the free version, which comes without the ability to record.