IOS 8

iOS 8 is the eighth major release of the iOS , designed and distributed by Apple as the successor to iOS 7 and the predecessor to iOS 9. It was announced on June 2 at 2014 Worldwide Developers Conference alongside watchOS 1 and OS X Yosemite.

iOS 8 features new compatibility with OS X 10.10 "Yosemite", such as enabling Macintosh computers to intercept calls from an iPhone and be used to talk to the caller. Starting on February 1, 2015, all new app submissions built with the iOS 8 SDK were required to have 64-bit support. Starting on the following June 1st, all app updates were also required to have 64-bit support.

New features

 * Siri can be invoked with "Hey Siri" from an Apple device plugged in to power.
 * HomeKit for automating smart-home devices.
 * HealthKit for health tracking.
 * Updated iCloud with support for iCloud Drive and iCloud Photo Library.
 * Family Sharing.

Supported devices
When iOS 8 was released on September 17, 2014, it was compatible with:
 * iPhone 4S, iPhone 5, 5C, 5S, iPhone 6, and 6 Plus
 * iPod touch (5th generation)
 * iPad 2, iPad (3rd, and 4th generation)
 * iPad mini, iPad mini 2
 * iPad Air, iPad Air 2

Trivia

 * This is the first iOS to feature the Apple Watch and Health apps.
 * This is the last iOS to use the original flat Music icon and the first iOS to use the new flat Music icon.
 * This is the last iOS to use the original flat Newsstand icon app.
 * This is the only iOS to update Passbook, which was replaced by Apple Wallet in iOS 9.