I operate a fleet of roughly 500 vehicles and need a single application that can receive the live GPS feed from every unit, plot each vehicle on a map, and let me follow them in real time from any device. The core goal is straightforward—navigation and tracking—yet the system must be robust enough to accept additional data streams later on, such as fuel consumption, driver-behaviour metrics, or maintenance records, without requiring a full rebuild. Here is what I expect as a finished product: • A responsive web dashboard that opens in any modern browser and refreshes vehicle positions automatically. • Native mobile apps for both iOS and Android with the same tracking capability, push notifications for route deviations, and the option to open turn-by-turn navigation in the device’s default map app. • A secure back-end that can ingest data from up to 500 trackers simultaneously, store historical routes, and expose a clean API for future data types. • Basic admin tools—user management, geofence setup, and downloadable reports—so I can run day-to-day operations without calling a developer. If you have worked with GPS protocols (Teltonika, Queclink, or similar), real-time mapping libraries (Leaflet, Mapbox, Google Maps), and cross-platform mobile frameworks (Flutter, React Native, or native Swift/Kotlin), your experience will be invaluable. I’m ready to move quickly once I see a concise plan that covers architecture, tech stack, and a realistic timeline.