I am building a mobile-first experience that lets people drop pins for tourist spots, restaurants, cafés, and outdoor adventures on a beautifully rendered, rotating 3D globe. Users can spin, zoom, and click any pin to open a lightweight info card, then add personal notes or upload their own tags to make each location their own. From inside the app they should be able to share a tagged spot—complete with snapshot and caption—directly to Facebook, Instagram, or Twitter with a single tap. The core of the project is the 3D globe. I’m open to the best toolchain for smooth performance—Unity, Three.js, Mapbox, or another framework you prefer—as long as touch gestures feel natural and fluid on both iOS and Android. Geo-coordinates will drive pin placement; a simple backend that stores pins, user notes, and basic media (photo or icon) will be needed as well. Deliverables: • Fully functional prototype running on iOS and Android emulators/devices • Source code with clear build instructions • Basic backend/API for pin, note, and user management • One-tap sharing workflow wired to Facebook, Instagram, and Twitter • Short hand-off guide so my team can extend locations and branding later I’ll provide the initial UI mock-ups and color scheme; you handle the interactive globe, data hooks, and social integrations. Please let me know which libraries you plan to use, any licensing considerations, and an estimated timeline to reach a testable beta.