Facebook has recently been recognized as number#1 in ?all time free app? in the
iPhone app store. Popularity of Facebook for iPhone is constantly exceeding with 7 million monthly active users, comprising 25% of 30 million mobile users. Usage metrics and engagement curve reveals that iPhone is undoubtedly the future of social applications. An amalgamation of the growing trend of iPhone usage and increasing engagement through Facebook has opened new horizons for advertisers as well.