Preview at WWDC likely in June, followed by September launch.
Apple Releases iOS 8 Beta 4 to Developers
The update, build number 12A4331d, is available through Apple's over-the-air updating system on iOS devices and can also be downloaded via the iOS Developer Center. Apple has also released Xcode 6 beta 4 and a new Apple TV beta.
iOS 8 introduces a range of new features, including improved integration with OS X through Continuity, a Health app, Family Sharing features, interactive notifications, a new QuickType Keyboard and improvements to several apps like Safari, Mail, and Messages.
iOS 8 beta 4 includes several new features, like a redesigned Control Center and the introduction of a new Tips app. For a full list of changes in the beta, make sure to check out our iOS 8 Beta 4 Tidbits post.
iOS 8 beta 4's Monday, July 21 release date was accurately predicted by BGR earlier in July.
Currently, iOS 8 is only available to registered developers, but the operating system is expected to be released to the public this fall after several beta iterations. Based on past history, iOS 8 will likely be launched alongside new iPhones, and possibly the much-rumored iWatch.