I want to launch a full-featured travel booking app for both iOS and Android that feels as effortless as Priceline or Expedia but adds its own layer of value. Core functionality includes live flight, hotel, and car-rental searches powered by the Amadeus, Travelport, and Sabre APIs. Users should be able to compare prices, complete bookings, and store their confirmed itineraries for offline access. The app will run on a three-tier subscription model—Basic, Premium, and VIP. As the tiers progress, members unlock exclusive offers and round-the-clock priority customer support. I’ll need secure in-app purchases (Apple/Google), automatic renewal handling, and a lightweight way to gate each feature set. Beyond booking, I want travelers to keep exploring even without a signal, so offline maps and “places to visit” suggestions have to cache smoothly. Push notifications will nudge users about gate changes, hotel check-ins, or new member deals. Deliverables I expect: • Native or cross-platform codebase ready for App Store & Google Play submission • Fully integrated Amadeus, Travelport, and Sabre endpoints with real-time pricing and availability • Tiered subscription engine with payment gateway, receipt validation, and admin controls to edit perks • Offline maps, itinerary storage, and destination suggestion module • Clean, intuitive UI/UX that mirrors leading OTAs yet keeps my brand identity • Basic analytics, crash logging, and a concise deployment guide The build should be performance-minded (fast API calls, minimal battery drain) and architected so future modules—loyalty points, last-minute deals, or partner activities—slot in easily. Once you’re ready, let’s outline milestones, agree on your tech stack preference (native Swift/Kotlin or React Native/Flutter), and get moving.