Millions of mobile apps on various app stores make it challenging for an app to stand out. A slow app launch can frustrate users, leading them to abandon the app after a single use. Users expect apps to start in 2 seconds or less, with cold launches taking around 5 seconds, warm launches around 2 seconds, and hot launches under 1.5 seconds. Measuring app launch times requires an application performance monitoring tool, which can help track performance statistics and provide insights into app quality. Instabug's App Performance Monitoring helps mobile teams assess their app's launch time by tracking key metrics such as Apdex scores, UI hangs, network timeouts, slow launches, custom traces, and more. The tool provides a thorough breakdown of how fast an app is launching across versions, devices, and operating systems, enabling quick assessments on whether the issue is app or OS related. By monitoring and comparing different app versions and starts, Instabug helps mobile teams make informed decisions to optimize their app's launch time and improve overall performance.