Rap Genius today launched an official iOS app that lets users dig into the sites massive archive of song lyrics, poetry, news articles, and other text, along with the many annotations that have been added by the Rap Genius community. The company — fresh off a temporary rift between itself and Google — boldly describes its Genius mobile app as a pocket guide to human culture. According to Lehman, it represents something of a new beginning for Rap Genius. This is the true launch of Rap Genius, he said. Once you install Genius, it will immediately pull together lyrics for all of the music in your iPhone or iPod touch library.