Android 9, also known as Android Pie, is a mobile operating system developed by Google. Released in August 2018, it introduced several new features aimed at improving user experience, such as adaptive battery management, which optimizes power usage based on app usage patterns, and gesture navigation for easier multitasking. Another significant addition in Android 9 is the enhanced privacy controls, allowing users to manage app permissions more effectively. The system also includes a new dashboard feature that helps users monitor and limit their screen time, promoting healthier digital habits. Overall, Android 9 focuses on personalization and user well-being.