Android app beta testing is a critical stage in the application development lifecycle, helping maintain mobile app quality and improve user experience. Beta testing involves external users testing an app in real-world environments to discover errors and provide feedback, which can be used to fix existing issues and implement new ideas. The process includes defining objectives, segmenting testers into groups for A/B split testing, distributing the beta build, collecting feedback, and analyzing metrics such as stability, quality, performance, churn rate, and meaningful participation. Various tools and platforms are available for distribution and managing the beta testing process, including Google Play Developer Console, TestFairy, Appaloosa, DeployGate, and Instabug. Effective communication with beta testers is crucial to ensure quality feedback, and the length of the beta testing phase depends on factors such as objectives, testers, participation, and deadlines.