Reverse Engineer an APK in KALI
Reverse engineering, also called back engineering, is the process by which a man-made object is deconstructed to reveal its designs, architecture, or to extract knowledge from the object; similar to scientific research, the only difference being that scientific research is about a natural phenomenon.
As an android programmer, you might interest with how does the app feature works or what kind of library they using. Or you want to find out the architectures/components of the app under the hood. Then we can try to extract the app source to check how it works. The first thing we can consider to achieve our target is reverse engineering.