Example Concept: On iOS, use techniques such as lazy loading of resources, deferring non-essential work, and optimizing the app's startup sequence. Employ Instruments to profile and identify bottlenecks. On Android, leverage the App Startup library to streamline initialization, use SplashScreen API to manage initial loading, and analyze startup performance with Android Profiler. Both platforms benefit from reducing the size of assets and optimizing code paths executed during launch.