I’m building a full-scale, on-demand package delivery service for both iOS and Android that works with the same tap-to-request convenience people associate with Uber, but geared toward parcels. The application must serve individual senders and business accounts alike, letting them schedule a pickup, watch the courier move in real time on a live map, and complete payment inside the app. Core feature set • Real-time tracking from pickup through drop-off, including push notifications at key milestones • Multiple payment options (major cards, in-app wallet, and any additional gateways you recommend) • Two-way ratings and written reviews so customers and couriers build trustworthy reputations Beyond those essentials, I’ll need standard account management, secure login, and a lightweight web-based admin panel where I can oversee active jobs, payments, and user feedback. Please propose your preferred tech stack—native (Swift + Kotlin) or robust cross-platform (Flutter, React Native, or similar)—along with an outline of milestones, a rough timeline, and the deployment approach you’d follow for App Store and Google Play submission. Clean, documented code and a brief hand-off session at the end will be part of the acceptance criteria.