The goal is to ship a straightforward, logic-driven B2B ordering app in Flutter that runs smoothly on both Android and iOS. I care far more about clean functionality, ease of use, and basic security than slick visuals or fancy extras. Mobile side • OTP-based login with phone number • One-time profile capture and storage (shop/hotel name, owner name, mobile, address) • Lightweight catalogue view (≈ 20–30 SKUs) with price and availability toggles • Simple cart → place order flow, followed by order-success confirmation • Order history accessible to the user • Integrated UPI payment step (intent-based is fine) Admin side A very lean backend/web console is enough. I just need to: • Add, edit, or disable SKUs and prices • View registered users and their orders No analytics, animations, AI, or scalability engineering is required—just clean code and a functional UI. Priorities 1. Ease of use 2. Security Timeline & hand-off I’d like the full solution—mobile app, admin panel, source code, and build instructions—delivered in roughly 2–3 weeks. When you respond, please share: • One or two similar Flutter projects you’ve done • Your proposed architecture/tech choices for the backend • A clear timeline with key checkpoints • Your fixed price for the entire scope Let’s keep it simple, functional, and on schedule.