APK- What is APK File- Check about .apk: The APK file is an icon-based package file format for Android, it can be transferred to and installed on an Android device. An APK file is a package file format used to distribute application software on Android.

The APK files can be installed on In other words, an Android app is a system level program running as an application that can run on an Android smartphone or tablet. All applications are applets (of sorts).