Smartphones have become one of the most important parts of modern digital life. People now depend on mobile devices for communication, browsing, entertainment, and online interaction throughout the day. Among all smartphone operating systems, Android remains one of the most widely used because of its flexibility, accessibility, and availability across different types of devices.As digital interaction continues growing, users now expect applications to function smoothly across smartphones without technical problems or complicated accessibility issues. Mobile users generally prefer apps that feel responsive, easy to navigate, and comfortable during everyday use. Since Android devices vary greatly in screen sizes, hardware specifications, and operating system versions, compatibility optimization has become extremely important for user satisfaction.