RapGenius

Just a month after Rap Genius got stung by Google for gaming search engine results, the lyrics and annotation site is delivering its popular service to iOS users with the launch of its first iPhone app.

While it features an optimized view of its annotated lyrics service its known for, it also has a Shazam-like feature for picking out the music playing around you. If you have music saved to your iPhone in the Music app, Rap Genius will pick songs it has lyrics for and present those to you as well. The music discovery feature was a bit hit-or-miss for me and a rather limited number of songs from my Music app appear, but the lyrics service of course works really well for the songs it does have.

Genius by Rap Genius is available for iPhone and iPod touch for free on the App Store.