From 2011 to 2012, Apple released the iPhone 4S[165][166] and iPhone 5,[167][168] which featured improved cameras, an intelligent software assistant named Siri, and cloud-synced data with iCloud; the third and fourth generation iPads, which featured Retina displays;[169][170][171] and the iPad Mini, which featured a 7.9-inch screen in contrast to the iPad's 9.7-inch screen.[172] These launches were successful, with the iPhone 5 (released September 21, 2012) becoming Apple's biggest iPhone launch with over two million pre-orders[173] and sales of three million iPads in three days following the launch of the iPad Mini and fourth generation iPad (released November 3, 2012).[174] Apple also released a third-generation 13-inch MacBook Pro with a Retina display and new iMac and Mac Mini computers.[171][172][175]