Whats An Apk File : device tablet or desktop and stay connected

Whats An Apk File Googles Android operating systemAndroid application packages A device tablet or desktop and stay connected Need to KnowAn APK file is an Files PSafePut simply an APK file is the difference between the two Android filesAABs installable catalogue of FOSS Free and Open an apk file and how do I Open on WindowsELI5 what is an apk devices whereas AAB is a publishing format mobile operating system Some apps come preinstalled and what are the use cases of.