As we all know that Apple updates it’s software’s and it’s available resources very often. Same goes for it’s iOS versions which updates more often as compared to its product’s launch.
iOS 9 are seen with the launch of iPhone 6 series and Apple engineer’s really did a cool job. iOS 9 is free from all the bugs that were present in the earlier version’s of iOS’s.
iOS 9 also have good response time and major of the application’s as well run’s pretty smoothly.