Beats Music on Tuesday launched its streaming service in the U.S., with iPhone users being the first to get access to a mobile application – the iOS application is already available for download from the App Store. Beats Music will offer users unlimited access to more than 20 million tracks as well as support for online and offline playback, and social network integration for $9.99 per month after a 7-day free trial period. The new service heavily advertises personalized playlists, allowing users to customize their music according to their preferences for “whatever” they’re doing during the day. However, an ad-supported free version is not available. Instead, Beats Music proposes only ATT subscribers a $14.99 per month special deal for family