If, when downloading applications for android, you came across the XAPK format, this application is one of several applications of the same type that serve to install this type of package on Android. XAPK files are compressed files that contain the APK, along with the application’s OBB files.
Using any XAPK Installer like the one developed by APK PURE, you’ll be able to download XAPK apps on your Android and install it as if it were an APK.