iOS 9 vs Windows Phone 10 vs Android 6.0, which is the best operating system? Here I make some comparison among iOS 9, Android 6.0 and Windows Phone 10. Hope it could help you find the answer. Availability Accroding to Apple Events, we get the iOS 9 release date-September 16th, 2015. Compared with iOS 9, Windows Phone 10 is likely to come out almost the same time and that is expected to launch before the end of this year. As for Android 6.0, also called Android Marshmallow or Android M 6.0, the latest Android mobile OS is almost ready to meet the public, with Google expected to unveil the final version of the OS before the end of September, 2015. Compatibility A common concern of the iOS 9, Windows Phone 10 and Android 6.0 Marshmallow users is that what devices are those new mobile operating system compatible? It makes no sense if your phone does not support the coming OS. So which is the best mobile operating system that ship with most existing devices in the comparison of Apple iOS 9 vs Android 6.0 vs Windows Phone 10? Apple iOS 9 is expected to be widely available on Apple devices: the eagerly awaited iPhone 6S/ iPhone 6S Plus/ iPhone 7, iPhone 6/6 Plus/5S/5C/5, iPad Pro, iPad Air 2/ iPad Air/iPad 4/3, iPad Mini 4/3/2. According to the early test o the Windows Phone OS 10 supporting devices, it is indicated that only a limited number of Lumia devices are compatible with the new mobile OS, like Lumia 630, 635, 636, 638, 730 and 830. More codes are said to be added to support a majority of Windows phones. It is said that Samsung Galaxy S6 and the Google's Nexus 2015 device will run the the new Android M 6.0. It's not clear whether Android M will support more devices or not when it comes to iOS 9 vs Android 6.0 Marshmallow or Android 6.0 vs Windows Phone 10, but in view of its predecessor Android Lollipop, also a variety of Android devices will run this OS. Features Whenever we make an mobile OS comparison, features are a key factor we should pay attention to. Will iOS which is famous for its outstanding features win the the comparison among iOS 9, Android 6.0 and Windows Phone 10 in this regard? Those with ear to the ground indicate that iOS 9 engineers put huge focus on bug fixes, size optimiaztions, stability maintenance and performance improvements. Which means not many new features will come with the new iOS 9. Speaking of iOS 9 vs Android M 6.0, the latter is also said to focusing largely on bug fixes. And also six areas will be the key points for the next Android operating system, including App Permissions, Web Experience, App Links, Mobile Payments, Fingerprint Support and Power & Charging. While in the this round of Apple iOS 9 vs Android 6.0 M vs Windows Phone 10 battle, the Windows 10 for phones may come with the most changes as Microsoft is trying to introduce many apps. The mobile operating system gives the same experience you get on PC on a smartphone this time, allowing users to making and receiving phone calls on PC. So apps and features will look similar on your phone to on your desktop. Battery life A huge factor for users to decide the best mobile operating system is how long the OS can run. It's difficult to make a mobile OS comparison 2015 in this regard as they are not available on a common hardware. As the battery life of the previous iOS 8 is a nightmare, and tips on how to increase iOS 8 battery are frequently asked and that's where the coming iOS 9 is also said to focus on. Google has built in a basic saver in Android OS which allows users to see the battery usage broken down by app that feature will surely be seen on Android M 6.0. Windows Phone also has a battery saver option with an estimate of the remaining battery life.