Mobile app usage is widespread, with 230 billion downloads in 2021, but 80% of apps are uninstalled if they don't meet user expectations. Mobile app performance testing is important to ensure apps work smoothly under various scenarios and metrics like response time, as users will delete apps with delays over 3-4 seconds. Performance testing involves simulating different workloads to test an app's speed, stability, reliability, and scalability. It is conducted through seven major steps to analyze how an app performs against benchmarks and identify areas for improvement. Outsourcing performance testing to expert companies ensures apps are flawless through rigorous testing.