💸 Wallet - Expense Tracker with React Native & Express 🚀

🎯 What You'll Build

This isn't just a front-end app — it's a complete mobile application with backend integration, authentication, and cloud-based storage.

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🧑‍🍳 App Features Overview

• 🔐 Authentication with email verification using Clerk
• 📝 Signup & Login flows with 6-digit email code
• 🏠 Home Screen that shows your current balance & past transactions
• ➕ Create Screen to add income or expense transactions
• 🔄 Pull to refresh functionality from scratch
• 🗑️ Delete transactions to update balance
• 🚪 Logout to navigate back to login screen

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🧠 What You’ll Learn

• ⚙️ Build and deploy an Express API with PostgreSQL using Neon
• 🔐 Implement authentication & email verification with Clerk
• 📲 Build a full mobile app with React Native & Expo
• 🧵 Manage state and navigation using React Navigation
• 🛡️ Understand and apply Rate Limiting using Redis
• 🚀 Deploy both backend & mobile with cloud-based tools
• 🧪 Beginner-friendly for first-time React Native devs

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📁 .env Setup

⚙️ Backend (/backend)

PORT=5001
NODE_ENV=development

CLERK_PUBLISHABLE_KEY=<your_clerk_publishable_key>
CLERK_SECRET_KEY=<your_clerk_secret_key>

DATABASE_URL=<your_neon_postgres_connection_url>

REDIS_URL=<your_redis_connection_url>

⚙️ Backend (/backend)

EXPO_PUBLIC_CLERK_PUBLISHABLE_KEY=<your_clerk_key>

⚙️ Run the backend

cd backend
npm install
npm run dev

📱 Run the mobile

cd mobile
npm install
npx expo start