Apple announced release date for iOS 11 as 19 September 2017, but not even two days after this announcement (September 14), iOS 11 was released in final version. A few days before the official date, but only for developers and for users who have enrolled deviceSites in Apple Beta Software Program.
Present on new devices iPhone 8, 8 iPhone Plus si iPhone X, iOS 11 brings some news, but most of them are for the iPad.
users iPhone I get a new one Notification Center, a new interface for App Store, more options in applications Notes si Photos, plus a few all filter brewing methods. added to the app Camera.