I’m creating a native Android travel companion that lets users plan, monitor, and record every aspect of a trip straight from their phone. The core build must cover: • Trip itinerary management – users can add, edit, reorder, and view daily schedules and transport or accommodation details. • Expense tracking – simple entry, auto-totals by category and currency, and export to CSV or PDF. • Photo and video storage – capture inside the app or import from the gallery, with automatic trip-based grouping and offline access. A clean, intuitive Material Design interface is essential, and the final APK should run smoothly on Android 12 and above. Please deliver full source code (Kotlin or Java), build instructions for Android Studio, and a brief README describing architecture and key libraries. When you reply, focus on your experience building travel, finance, or media-heavy Android apps and any relevant GitHub or Play Store links—those examples will weigh most in my selection.