Users don't care about your network architecture; they just want apps that feel instantly responsive. However, dealing with flaky mobile connections usually means littering our React Native codebases with isLoading states, skeleton screens, and error boundaries. This talk will demonstrate how to architect a "Zero-Latency" app using optimistic UI and local-first sync. We'll dive into the mechanics of writing to a local store first, handling background synchronization, and gracefully managing conflict resolution—all while giving the user a flawless, uninterrupted experience.