In technical terms, a base.apk is the primary file containing the core code and resources of an app. When apps are split into multiple parts (Split APKs), the base.apk is the essential foundation required for installation. How to Install and Use KeX
NetHunter KeX (Kali Desktop Experience) bridges the gap between mobile and desktop. It provides a full graphical user interface (GUI) for Kali Linux tools, allowing you to run powerful security software like Nmap, Metasploit, and Wireshark directly on your Android device.
The "base apk" you are looking for is likely the , which allows you to connect to a running Kali Linux desktop session from your phone. Understanding NetHunter KeX