I need a lightweight Android application called “NLINE Warranty Checker” that lets anyone type a product’s serial number and instantly see its warranty details. When the serial exists the screen should show product name, purchase date, total warranty months, expiry date, status (Under / Out of Warranty), remaining days, description, and an image if one is stored. If the serial is missing, a simple “Not Found” message is enough. An admin-only panel—protected by a single password—is required to maintain the data. After logging in I should be able to add one item at a time or upload a CSV in the format serial,product,purchase_date,warranty_months,image_url,description. All fields except the image URL are mandatory. I’d like you to keep the infrastructure inexpensive and straightforward, so Firebase is my first choice for the backend. A clean collection structure and concise Cloud Functions (if needed) will do the job; no elaborate dashboards. The Android client must talk to Firebase in real time and work smoothly even on older devices. Deliverables • Compiled, working APK ready for installation • Complete Android Studio project with readable, well-commented code • Short setup guide covering admin login, Firebase configuration, and CSV bulk upload A plain, modern UI is fine—I value speed and clarity over fancy visuals. The app logo will be supplied later. Please keep the build lean, avoid unnecessary libraries, and aim for a quick turnaround within my limited budget.