iOS 9 will support iPhone 4S iPhone 5 iPhone 5C iPhone 5S iPhone 6 iPhone 6 + iPhone 6S iPhone 6S + iPod touch 5 iPod touch 6 iPad 2 iPad 3 iPad mini iPad 4 (Retina) iPad mini 2 (Retina) iPad Air iPad Air 2 iPad mini 3 iPad mini 4 iPad Pro IOS 9 will have a lot of new features including : 1. New news app (Replaces Newsstand) - supported on all devices 2. Multitasking for iPad - A. Slide over - iPad Air / Air 2 / Mini 4 / Mini 3 / Mini 2 / Pro B. Split view - iPad Air 2 / Mini 4 / Pro C. Picture in Picture (PIP) - iPad Air / Air 2 / Mini 4 / Mini 3 / Mini 2 / Pro 3. Proactive Assistant iPhone 5 iPhone 5C iPhone 5S iPhone 6 iPhone 6+ iPhone 6S iPhone 6S+ iPad 4 (Retina) iPad mini 2 (Retina) iPad mini 3 iPad Air iPad Air 2 iPad mini 4 iPad Pro iPod touch 6 ( A5 devices like iPhone 4S, iPod touch 5, iPad mini, iPad 2, iPad 3 are not supported) 4. 6 digit passcodes - supported on all devices 5. Low battery mode - iPhones only (no iPads and iPods are supported) 6. San Francisco font - all devices 7. Notes app improvements - all devices, Sketch : iPad 4 and later iPad mini 2 and later iPhone 5 and later iPod touch 6 8. Handoff apps would be displayed in the app switcher Handoff and Continuity are supported on : iPhone 5 iPhone 5C. iPhone 5S iPhone 6 iPhone 6 + iPhone 6S iPhone 6S + iPad mini iPad 4 iPad Air iPad Air 2 iPad mini 2 iPad mini 3 iPad mini 4 iPad Pro iPod touch 5 iPod touch 6 9. CarPlay now pairs with Bluetooth and USB CarPlay is supported on : iPhone 5 iPhone 5C iPhone 5S iPhone 6 iPhone 6 + iPhone 6S iPhone 6S + iPod touch 6 10. iPad keyboard shortcuts - iPad 2 and later, iPad mini and later. 11. iPad folders new 4x4 interface - iPad 2 and later, iPad mini and later. 12. Siri new interface Siri is supported on : iPhone 4S iPhone 5 iPhone 5C iPhone 5S iPhone 6 iPhone 6 + iPhone 6S iPhone 6S + iPad mini iPad 3 iPad 4 (Retina) iPad Air iPad Air 2 iPad mini 2 iPad mini 3 iPad mini 4 iPad Pro iPod touch 5 iPod touch 6 13. Improved performance On : iPad 2 iPad 3 iPad 4 iPad Air (iOS 9.3) iPad mini iPad mini 2 (iOS 9.3) 14. Photos - A. Added preview scrubber bar to photo viewer. Supported on all devices Except : iPod touch 5 which is getting it in next betas B. New Selfies folder in Photos C. New folder for screenshots in Photos. 15. Safari Content blocker Needs 64 but architecture to work Supported only on : iPhone 5S iPhone 6 iPhone 6+ iPhone 6S iPhone 6S+ iPad mini 2 iPad Air 1 iPad mini 3 iPad Air 2 iPad mini 4 iPad Pro iPod touch 6 16. Maps - New Transit Supported only on : iPhone 5 iPhone 5C iPhone 5S iPhone 6 iPhone 6+ iPhone 6S iPhone 6S + iPad 4 iPad Air iPad Air 2 iPad mini 2 iPad mini 3 iPad mini 4 iPad Pro iPod touch 6 17. Size of update minimized Apple says that the update size would be minimized from 4.5 GB (iOS 8) to 1.3 GB (iOS 9), but the size would vary from device to device. Actual update size : 1.1 GB - iPad Air 2 / iPhone 6 / 6+ 1.0 GB - iPad Air / iPhone 5S / iPod touch 6 980 MB - iPad mini 2 950 to 1 GB - iPad 4 / iPhone 5 / 5C 800 MB - iPad mini / iPad 3 / iPhone 4S 700 MB to 800 MB - iPad 2 18. Night shift (iOS 9.3) New! Supported only on : iPad Air iPad Air 2 iPad mini 2 iPad mini 3 iPad mini 4 iPad Pro iPhone 5s iPhone 6 iPhone 6 Plus iPhone 6s iPhone 6s Plus iPod touch 6 19. Notes - Protection and security. (iOS 9.3) Passcode : supported on all devices. Touch ID : supported on iPhone 5s and later, iPad Air 2, iPad Pro, iPad mini 3 and later. 20. New Health up (updated look & content) : available on all iPhones and iPods. 21. Improved Quick Actions for 3D Touch for iPhone 6S/6S+ including a set of new options when force touching AppStore, iTunes Store, compass, clock, settings and weather. (iOS 9.3) 22. Siri - new languages. Arabic - iOS 9.2 Finnish (Finland), Malay (Malaysia) - iOS 9.3 23. Improvents to Wallet Lower brightness and option to open an app that's linked to a pass or credit card. (iOS 9.3) 24. Watch, pair with more than one Apple Watch (iOS 9.3) 25. Education "iPad" (iOS 9.3) includes shared iPads features for students, a new Classroom app, also improved Apple ID management features. 26. New News (iOS 9.3) More personalised content based upon person's interest. New trending topics in For You section. A new landscape mode for iPhone has been also added. It's also said to be faster in loading topics for faster and improved usability and personal experience. 27. New Health (iOS 9.3) Links to apps users can download to display health data on the dashboard. Activity features from Apple Watch are now displayed on the dashboard too. 28. CarPlay improvements (iOS 9.3), support for 2016/2017 car models and the US and some other countries, improvements to Apple Music, Improved maps with suggested places or Nearby. 29. Improvements to App switcher when using 3D Touch for iPhone 6S/6S+ (iOS 9.3) Includes peeking into the app switcher when less force is applied and popping into the switcher when applying more force on the touch screen. - Performance 1. iPad ~ iPad 2 doesn't get any of the special features, it gets general features that exist when updating to any new version of iOS and some good performance enhancements for more usability. *** ~ iPad 3 got some enhancements to the performance, and design tweaks to Siri * ~ iPad mini got Performance enhancements but still didn't reach how it was with iOS 7. * ~ iPad 4 got animation & performance enhancements in addition to new proactive assistant and transit features, performance improved with iOS 9.2 * ~ iPad Air got slide over multitasking and the performance has improved with iOS 9.3* ~ iPad Air 2 got the multitasking split view features, performance is the same with some bugs that are fixed with iOS 9.2 and 9.3* ~ iPad mini 2 got some enhancements to performance and animations and the new slide over. * ~ iPad mini 3 got new multitasking features, performance is same as iPad mini 2.* 2. iPhone ~ iPhone 4S got the general new features that come with every iOS update. *** ~ iPhone 5 got some animation improvements, the new Bluetooth CarPlay toggle in settings, the new proactive assistant and the low power mode. * ~ iPhone 5C got enhancements to performance and new proactive assistant and rest of the features that are there with iPhone 5 iOS 9 update. * ~ iPhone 5S got a new secure 6 digit passcode to protect the data on iPhone and performance enhancements with iOS 9.3 ** ~ iPhone 6 and 6 Plus got the same features that are given to the iPhone 5S with the iOS 9 update with new wallet app for making Apple Pay purchases. * 3. iPod ~ iPod touch 5 - got performance enhancements, some bugs are still found. ~ iPod touch 6 - newer improvements after upgrading, performance enhancements * Features above could not only exist in one iDevice but many other iDevices. ** iPhone 5S new passcode features are present in all iOS 9 devices. *** General system tweaks means that there small updates that come with every iOS 9 device. - Performance on a scale Scale : 1-3 Bad 4-6 OK 7 Good 8-9 Very Good 10 Perfect 1. iPhone A. iPhone 4S (6/10) B. iPhone 5 (8/10) C. iPhone 5C (8/10) D. iPhone 5S (9/10) E. iPhone 6/6+ (9/10) F. iPhone 6S/6S+ (10/10) 2. iPad A. iPad 2 (7/10) B. iPad 3 (7/10) C. iPad mini (7/10) D. iPad mini 2 (8/10) E. iPad 4 (8/10) F. iPad Air (8/10) G. iPad mini 3 (8/10) H. iPad Air 2 (9/10) I. iPad Pro (10/10) 3. iPod touch A. iPod touch 5 (7/10) B. iPod touch 6 (9/10) _______________________________________________________________________________ Advice : if you have an iPhone 4S / iPhone 5 / iPhone 5C, sign up for the public beta to try new updates to iOS 9 first before upgrading, as some users experience slow performance on iPhone 4S and minor animation bugs on iPhone 5 and iPhone 5C. If you have an iPhone 5S, think well and watch iOS 9 reviews on YouTube before you upgrade. You can also try it your self by signing up for the public beta. If you have an iPad 2, iPad 3, iPad mini, you should upgrade as soon as it's live in September as it enhances the performance and will improve preformance up to an acceptable level. If you have an iPad 4, the update will totally improve the animations and will minimise lag and stutter, it's is good to update especially if you are on iOS 8. If you have an iPad Air, iPad mini 2, sign up for the public beta to try them first before upgrading, as some users experience lagging and bad animations on those devices. If you have an iPod touch 5, the performance will stay the same after upgrading to iOS 9 and most of the features do not support iPod, so it's good to watch reviews before update to know if you are going to upgrade as well cause there maybe little bugs. If you have an iPod touch 6, the performance will improve, newer features that iOS 9 offers would be added. Before you upgrade to iOS 9, think about its Pros and Cons and also think about the Pros and Cons of the system version you are on (iOS 8, iOS 7, iOS 6) If you like Newsstand, stick with iOS 8 or earlier as its replaced by the new News app, which could be annoying for some users who used Newsstand for many years. Information is subject to change. If you have any questions, feel free to ask any questions in the comment bar iOS 9.3 and 9.2 additional features updated.