Android forensics refers to the process of acquiring, examining, and reporting on digital evidence from Android devices, which is of paramount importance because the Android operating system is currently the most popular in the world. Investigations on Android-based devices involve understanding how the Android operating system is structured and how information is stored. The Android operating system's openness and its applicability on various hardware make forensic analysis very challenging but also beneficial in numerous cases, ranging from cybercrime to legal situations. What is the structure of the Android system?