To optimize a list-heavy screen in a mobile app: * Use virtualized lists (render only visible items). * Implement pagination/infinite scroll instead of loading all data. * Optimize and cache images with lazy loading. * Reduce re-renders using memoization/pure components. * Keep layouts lightweight and use skeleton loading for smooth UX.

Another effective way is to develop a minimum viable product (MVP) with core features and test it with a small group of users. Their engagement, feedback, and retention rates will help you decide whether your idea has real potential. You can also launch a landing page or mockups to gauge interest before full development. Partnering with an experienced social media app development company can further help you validate, refine, and scale your idea with the right technology and strategies.