Retailer & Mason Reward Management App

I run a building–material wholesale operation and need a cross-platform mobile app (native or well-built hybrid) that lets me keep every stakeholder, from retailers to on-site masons, fully informed and motivated. Retailer module • Retailers log in to record each sale of my products. • The system automatically tallies their sales history and shows real-time overdue balances so both sides always see the same numbers. • I can adjust or upload credit notes, payments received, and comments from an easy web or admin panel, with instant sync to their phones. Mason / builder loyalty module • Every time a mason lifts material from a linked retailer, the retailer records the quantity; the app assigns reward points based on my rules (I should be able to edit multipliers and expiry dates). • Masons track their daily lifting totals, current points, and upcoming reward tiers inside the app, nudging them toward higher volumes. • Push notifications remind them of promotions, new product launches, and points about to expire. Core requirements 1. Available on both iOS and Android, using a single code-base if that keeps maintenance lower. 2. Secure login with OTP or social sign-in, role-based dashboards (Admin, Retailer, Mason/Builder). 3. Cloud database with simple CSV import/export so I can back up or audit data at any moment. 4. Basic analytics panel (web) that shows overall sales, outstanding credit, and points issued/redeemed. 5. Clean, intuitive UI—most users are not tech-savvy and may work in low-bandwidth areas. When you reply, please send a detailed project proposal that covers tech stack, architecture, milestone plan, and any similar work you have delivered. I will shortlist based on clarity of approach rather than a long list of past projects.