Pandora is a personalized online radio station that launched in 2000 and uses the Music Genome Project to analyze songs and create customized stations for users. It grew rapidly from 10 million users in 2008 to 50 million in 2010 and also launched an iPhone app. While Pandora is easy to use and offers a good selection of music, some are concerned about overuse of songs and that its restrictions on repeats and limited skips could impact music consumption practices and record labels. Pandora also faces restrictions on being played in public spaces and generates revenue primarily through advertising.