Monitoring the right beta testing metrics is crucial for assessing the progress and readiness of an app, as these metrics provide insights into both technical performance and user engagement. Key technical metrics such as crash-free session rates, app launch times, and issues reported by lines of code help evaluate app quality and the effectiveness of internal testing. Engagement metrics, including daily active users, session duration, and feature usage, reveal how testers interact with the app, while retention metrics like churn rate and Net Promoter Score offer insights into user loyalty and satisfaction. Tools like Luciq enhance this process by providing comprehensive bug reporting, crash reporting, and mobile-first performance monitoring, allowing teams to capture detailed user feedback through in-app surveys and visual session replays. Ultimately, understanding these metrics in context allows developers to make informed decisions, ensuring the app is not only functional but also valuable and engaging to its users.