<P> iOS 11 received mostly positive reviews . Critics significantly praised the application dock and new multitasking interface on the iPad, crediting them for renewing the user experience . Further praise was directed at the redesigned Control Center offering customizable toggles, though it was criticized for lack of third - party app support, lack of Wi - Fi network selection ability and for difficult usage on small screen sizes . Critics also noted the new augmented reality development tools, but said their impact would depend on third - party apps and how fast developers embraced them . Praise was also directed at the App Store's redesign and the new file - management tools . Shortly after release, it was discovered that disabling Wi - Fi and Bluetooth connections through the Control Center does not disable the respective chips in the device in order to remain functional for background connectivity, a design decision sparking criticism for "misleading" users and reducing security due to potential vulnerabilities in inactive open connections . The iOS 11.2 update added warning messages to explain the new functions . </P> <P> Two months after release, 52% of iOS devices were running iOS 11, a slower adoption rate than previous iOS versions . The number increased to 59% of devices by December 2017 . </P> <P> iOS 11 was introduced at the Apple Worldwide Developers Conference keynote address on June 5, 2017 . The first developer beta version was released after the keynote presentation, with the first public beta released on June 26, 2017 . </P> <P> iOS 11 was officially released on September 19, 2017 . </P>

When did ios 11 beta 1 come out