Users can preview ('Peek') at content without moving away from the current screen before they enter ('Pop') the previewed content into full view. Quick Actions are shortcuts on home screen app icons. Additionally, iOS 9 brought new user experience functions, including Quick Actions, and Peek and Pop, based on the touch-sensitive display technology in the iPhone 6S. In iOS 9.3, Apple added a Night Shift mode that changes the color of the device's display to a warmer, less 'blue light' containing shade, to reduce any negative eye health effects on users' circadian rhythms. iOS 9 also added multiple forms of multitasking to the iPad. For searching, the proactive intelligence can display instant results in a widget-like format, including weather, sports, news, and more. Major new system updates include proactivity, where Siri and advanced search are combined to make the operating system more contextually aware of information (such as time and location), and can provide the user with information ahead of time.

Most notably, Notes received the ability to draw sketches with different tools, image insertion, prominent visual appearance for website links and map locations, and advanced list formatting an all-new Apple News app aggregates articles from different sources and Apple Maps received mass transit support, although in a limited number of locations at launch. IOS 9 incorporated many feature updates to built-in apps. It was succeeded by iOS 10 on September 13, 2016. It was announced at the company's Worldwide Developers Conference on June 8, 2015, and was released on September 16, 2015.

IOS 9 is the ninth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iOS 8. Obsolete, partial third party app support IOS 9 – Apple at the Wayback Machine (archived September 6, 2016) Proprietary EULA except for open-source components

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