I’m building a full ride-hailing style system that runs seamlessly on iOS, Android, and the web. The experience must cover the entire flow—from a new user creating an account, through real-time GPS tracking of each trip, to secure in-app payment processing and automated receipts. Four distinct roles have to coexist: an Admin panel where I can manage everything, a User app for booking rides, an Operator interface to assign or monitor activity, and a Customer view for service feedback and history. All data should stay perfectly in sync across devices, with push notifications and live status updates working the same whether the ride is booked on the mobile apps or the browser version. I’m open to the tech stack that will get us there efficiently (native, Flutter, React Native, or another solid cross-platform approach), as long as the final deliverables include: • A production-ready iOS app submitted to the App Store • A production-ready Android app published on Google Play • A responsive web portal for desktop and mobile browsers • Separate, secure dashboards for Admin, Operator, User, and Customer roles • Integrated payment gateway, GPS tracking, and basic auth/registration wrapped in a clean, intuitive UI Please bring proven experience shipping location-based, payment-enabled apps and be prepared to share a concise project timeline with milestones for design, development, QA, and store deployment.