I need a complete rideshare solution built from the ground up for both iOS and Android. The core flow is familiar—riders request, drivers accept, trips are tracked in real time—but there are a few extras that are non-negotiable: • Third-party booking: a user must be able to schedule and pay for a ride on someone else’s behalf. A common use case will be parents arranging rides for their children. • In-app texting: rider ↔ driver, plus system notifications, all stored for audit. • PayPal checkout: for now that is the only payment rail we’ll launch with, so make sure the integration is production-ready and PCI-compliant. • Centralised user store: one secure database that holds drivers, riders, and parents with clearly differentiated roles and permissions. • Admin web console: trip overview, manual dispatch, user management, and reporting. • GPS tracking: live map in the rider app, breadcrumb trail in the admin console, with arrival-time estimation. Deliverables I expect: 1. Native (or high-performance cross-platform) mobile apps for driver and rider. 2. Responsive admin panel. 3. Well-documented REST/GraphQL backend, database schema, and deployment scripts. 4. Source code pushed to a private repo, plus a short hand-off call and walkthrough video. For acceptance I will test: creating an account, booking a ride for someone else, live tracking, PayPal payment capture, admin trip visibility, and chat history retrieval. If those flows complete without errors the milestone is met. Let me know which tech stack you recommend and an estimated timeline to reach an MVP.