CI/CD for mobile applications involves complex challenges due to the specialized requirements of mobile app development and deployment, including the need for dedicated build environments, comprehensive device testing, and adherence to intricate app store regulations. Unlike web applications, mobile apps necessitate a sophisticated CI/CD pipeline to manage diverse operating systems, device fragmentation, and platform-specific security and performance standards. Effective CI/CD strategies must address these challenges through multifaceted testing approaches, optimized build processes, and seamless app store deployment automation. CircleCI is highlighted as a proficient platform for mobile development, offering advanced build environments, testing support, and deployment automation, which are critical for sustaining development speed and quality in mobile app delivery.