iOS 8 is a big iOS release for developers and everyone else. Apple set out to create the most natural experience. Each enhancement has a purpose. Every new feature deserves to be a new feature. Each function is more considered, each next step is more eﬃcient.
Apple spent a significant amount of its WWDC 2014 keynote focusing on iOS 8, which takes the flat iOS 7 design and only rounds it out with new features.
iOS 8 features tighter Mac integration while loosening the restrictions on Apple's Touch ID fingerprint sensor. New software kits also bring once fragmented security and health gadgets together.