I’m building a travel-planning tool that works seamlessly in any modern browser and as a native Android app. The heart of the product is an automatic scheduling engine: a traveller enters destinations, dates, interests, and constraints, then the system generates a balanced day-by-day itinerary without manual drag-and-drop. To make plans truly actionable, I also need live integrations with flight booking services, hotel booking services, and maps / navigation APIs. The idea is that a user can check the latest flight options, lock in accommodation, and instantly see routes and travel times—everything updating the itinerary in real time. Here’s how I picture the workflow: • Responsive Web front end built with a modern stack—React, Vue or similar—mirrored by an Android version (Kotlin, Flutter or React Native are all fine). • A shared backend that houses the scheduling logic, user accounts, and third-party connections; REST or GraphQL, whichever suits the architecture best. • Clean, modular codebase with clear documentation so future features like collaborative editing or template libraries can be added without rewrites. Acceptance criteria • User enters trip parameters and receives an auto-generated itinerary within seconds. • Real-time flight and hotel data pulled from external APIs; selecting an option updates the schedule immediately. • Interactive map displays every stop and intra-day route. • Single sign-on across Web and Android with the same account data. • Source code, build instructions, and short technical walk-through delivered on hand-over. If this aligns with your skills and you can advise on the best third-party APIs for flights, hotels, and mapping, let’s start planning the build timeline.