I’m planning a fully featured navigation application that runs smoothly on iOS, Android, and a modern web browser. The single most important function is reliable, turn-by-turn guidance, so the core of the job revolves around integrating (or building) a mapping engine that can fetch live positioning data, calculate routes quickly, and recalculate on the fly when the user deviates from the path. THE FLUTTER APPLICATION ALREADY EXISTS. High-level scope (AI generated, let us discuss this) • Build a responsive map UI with zoom, pan, and smooth transition animations • Implement real-time GPS tracking and turn-by-turn voice directions • Provide an efficient route engine that handles car, bike, and walking modes • Expose search for addresses and points of interest through an API of your choice • Sync user preferences (saved places, recent searches) across devices via a small cloud backend • Produce deployable builds for the App Store, Google Play, and a secure web hosting environment Acceptance criteria • Consistent feature parity and design across iOS, Android, and Web • Average route calculation under two seconds on a mid-range device • Unit and integration test coverage for critical navigation logic • Cleanly documented code and setup scripts so another developer can reproduce the build in one session The target launch window is April 2026, giving us room for incremental milestones, beta testing, and app-store review. If this timeline fits your workflow and you have direct experience shipping navigation or map-heavy products, let’s discuss approach, data licensing, and a realistic release plan.