Android system is a mobile phone system developed by Google in the United States. Now the whole version has been updated to Android5 series, the system is constantly optimized and the experience is getting better and better. Because Android system is open source, many domestic manufacturers have adopted Android system, such as Xiaomi, Meizu, HTC and other mobile phone systems are highly customized on the basis of Android system. The common software format suffix of Android system is APK；; ;
IOS system is independently developed by Apple. Because the IOS system is closed, only Apple phones use this system at present, and the IOS system is stable and runs smoothly. The common software format suffix of IOS system is IPA.