You might have downloaded apps that come split into several files in APK format. You might even have come across them here at Malavida. For such cases, you'll need to get hold of a tool of the likes of Split APKs Installer.
Install and also export your own applications
The application also comes along with a file explorer. You'll simply have to search for the app of your choice in the folder of your Android device and select it for its installation, including files compressed as ZIPs. The process will run automatically, allowing us to install the bundle on our smartphone or tablet just like any other APK. And if you need to extract an application and split it into several files, SAI also allows you to export them.
It's especially useful for those cases in which the APK and data files are separated in the so-called app bundles. You'll probably run into this case with games that come along with MODs and data packages that update the base file.