The iOS platform has grown much since its launch back in 2007. The Mac OS was introduced in 1987, and improved greatly over the years. From the 28 years that Apple has sold Macs, the earnings of 2011 iOS devices sold greatly surpassed that, specifically the iPhone. The iOS platform has evolved exponentially due to revolutions such as the App Store. The App Store is the face of the iOS. According to ASYMCO, 316 billion iOS units have been sold in 2011 versus the 122 billion Macs that have been sold in the past 28 years.