It is program through which user can be able to organize android.apk file. In digital world, every file has its own identification and standard extension through which it get accessed by capable tools. For instance, a simple text processing file will have .txt, .xml extension that makes it identical for user. Similarly .apk file extension is one of these created for android based operating system smartphone. It is an extension which make it identical as an android file. This is own by Google and lot of apps are pre-installed in android smartphone end up with .apk extension. While some of the application are supposed to install manually by the user. APK extension is commonly used by the developers who designs android application like games, utility apps and so on. They begin considering this android.apk extension which relate it to the android operating system.