Android is a touchscreen mobile operating system based on a modified version of the
Linux kernel and other open source software, built primarily for smartphones and tablets.
Android's kernel is built on the long-term support (LTS) branches of the Linux kernel. Android uses Linux kernel versions 4.4, 4.9, or 4.14 as of 2020.
Android's basic functionality, such as process management, memory management, security, and networking, is managed by the Linux kernel. When it comes to security and process management, Linux is a tried and true platform.