Complete feature guide to Apple's latest iOS 4
iOS 4 (previously iPhone OS 4 or iPhone 4.0) continues Apple's relentless yearly mobile OS update cycle. If 2007 was the mainstreaming of the multitouch user interface, 2008 all about the App Store, and 2009 was filling in the feature list, then iOS 4 promises to be... well, that's why we're here.
(And yes, iOS. That's the new name Apple has licensed from trademark-holders Cisco to represent the iPhone, iPad, and iPod touch -- and maybe soon the Apple TV and who knows what else -- family.)
Back on April 8 at the sneak preview event, Apple promised 7 "tent-pole" features and 100+ general user features overall, along with 1500 major new API for developers. We're going to walk you through the ones that matter most.
Note: iOS 4.1 is now available. See our complete iOS 4.1 walkthrough for the latest on Game Center, HDR photography, Ping social music network, and the other new features.
See also our iPhone 4 review for more on hardware specific features.