Deployment and maintenance are critical components of mobile app development. After rigorous testing and approval, the app is submitted to app stores like Google Play and the Apple App Store. The submission process includes meeting specific guidelines and ensuring the app is free of critical issues. Post-launch, continuous maintenance is essential to address user feedback, fix bugs, and roll out new features. Regular updates help keep the app relevant and secure, enhancing user satisfaction and retention. Effective maintenance strategies involve monitoring app performance, analyzing user data, and adapting to changing market trends.