I’m creating a native Android app that sells physical goods, and the top priority is a smooth product browsing–to-checkout experience. Product browsing must include: • Product categories and filters • Product search functionality • Product ratings and reviews After a shopper finds what they want, they should be able to add it to a cart and complete payment through a mainstream gateway; a straightforward order-summary screen is enough for this phase. I will provide the product catalogue through a REST endpoint, so the app needs to consume that data and refresh imagery, pricing, and stock in real time. Please build in Android Studio, keep the code clean and well-commented, and follow standard Material guidelines. Deliver the full project files plus an installable APK; a short README and any unit/UI tests you can include will mark the job complete.