as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
explain what android os is
user
android os is a free and open source operating system created primarily for mobile devices such as smartphones and tablets. it is developed and maintained by google and uses a custom linux kernel. it is designed to be customizable, allowing users to change everything from the os's look and feel to its functionality. it is based on the popular android open source project (aosp).
assistant