Fortnite APK works in a very simple way. Once you download the file, your phone reads it and installs the game just like any other app. But since it is not downloaded from the Play Store, you need to allow installation from unknown sources in your phone settings. Fortnite APK also updates itself. Sometimes, you may need to download a new version manually, but the process remains the same. This ensures that you always have the latest features and improvements.