I want to give my customers a dedicated Android application where they can browse, choose, and purchase my products without ever leaving their phones. The goal is straightforward: a smooth catalog-to-checkout flow that feels native, loads quickly, and handles transactions securely. Here is what I need the finished work to include: 1. A modern Android app (Java or Kotlin) with home screen, product catalog, search, product detail, shopping cart, and secure checkout. 2. Integration with a well-supported payment gateway so customers can pay with cards and popular local methods. 3. Basic order tracking for the buyer and an admin dashboard or lightweight web backend that lets me add products, update stock and prices, and view orders in real time. 4. Source code, build instructions, and a signed release APK ready for Google Play submission. I will supply product data and branding assets as soon as we begin. Let me know the tools and libraries you prefer, any extra permissions you anticipate needing, and a realistic delivery timeline so we can keep the rollout on schedule.