The audio quality is solid, and playback is smooth as silk. Searching for specific artists and albums was a breeze, and I couldn’t find any holes in their library based on my personal taste. The service boasts 9 million tracks from all major labels, as well as 35,000 indie labels, so unless you’re a musical freak of nature, you’re bound to find everything you’re looking for.

Gone are the days of tuning into an Internet music feed and getting cut off when your bike ride or run hits a dead zone. This app stores tracks as it goes, keeping you listening long after your bars drop to zero.

Use the “Genie” option to discover new tracks, set up favorites, and build an unlimited number of playlists. You can even import your playlists and favorite artists from iTunes. Best of all, the service auto-syncs everything between your phone and your desktop Mac or Windows machine.

The downside? Like any great music service, it’s addictive. My free trial lasts only three short days before the $9.99 per month subscription fee kicks in.

If you’re a music junkie who’s spending more than $10 a month on iTunes (who isn’t?), or you’re on the road more often than not, Thumbplay Music is more than worth the fee to stay connected to an amazing library of tunes.