📉 PriceMonitor – E-Commerce Price Drop Notifier

PriceWatcher is a mobile application and backend service that monitors product prices from e-commerce websites (like Amazon) and notifies users when their selected product drops below a desired price.

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📱 Features

• Track product prices in real-time
• Set a target price per product
• Receive instant notifications when the price drops
• Support for major e-commerce platforms (starting with Amazon)
• Background scraping and automated updates

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🏗️ Architecture Overview

This project consists of two main components:

1. Backend (Node.js + Puppeteer)

   • Scrapes product details periodically
   • Compares current prices to user-defined targets
   • Sends notifications via push service (Firebase Cloud Messaging or similar)
   • Stores user and product data in a cloud database (e.g., MongoDB or Firebase)

2. Mobile App (React Native)

   • Allows users to add products by URL and set price thresholds
   • Displays tracked products and price history
   • Handles push notifications and alerts

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🧰 Tech Stack

• Frontend: React Native
• Backend: Node.js, Puppeteer
• Database: MongoDB Atlas / Firebase Firestore
• Notifications: Firebase Cloud Messaging (FCM)
• Deployment: Vercel / Render / Heroku (customizable)

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🚀 Getting Started

Backend Setup

git clone https://github.com/yourusername/pricewatcher-backend.git
cd pricewatcher-backend
npm install