# 📱 Smart Calculator Hub (Android App)

**Smart Calculator Hub** is a modern, all-in-one Android app built with **Jetpack Compose** and **Kotlin**, designed to help students and professionals
with daily academic and financial calculations — fast, offline, and beautifully.

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## 🚀 Features

### 🎓 CGPA Calculator
- Add subjects with names, grades, and credits  
- Calculates your CGPA instantly  
- Automatically saves your data using **DataStore**  
- Data is restored even after app restarts  

### 🧮 Standard Calculator
- Sleek and functional calculator interface  
- Supports basic math operations (+, −, ×, ÷)  
- Built-in **calculation history** screen  
- Users can clear or revisit past calculations  

### 💸 Sales Tax Calculator
- Enter any amount and tax percentage  
- Calculates tax and total cost instantly  
- Supports multiple currencies (static)  
- Great for freelancers, businesses, and shoppers  

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## 🛠️ Tech Stack

- **Jetpack Compose** – modern UI toolkit  
- **Kotlin** – robust, concise Android language  
- **DataStore** – persistent local data storage  
- **Material Design 2** – clean and accessible interface  

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## 📸 Screenshots

<table>
  <tr>
    <td><b>CGPA Calculator</b></td>
    <td><b>Calculator</b></td>
  </tr>
  <tr>
    <td><img src="https://github.com/user-attachments/assets/5d120cd7-4f92-4676-89af-3cf8a7f1924b" width="250"/></td>
    <td><img src="https://github.com/user-attachments/assets/e3971c39-c34f-4756-b275-ed6ab83ec944" width="250"/></td>
  </tr>
  <tr>
    <td><b>History Screen</b></td>
    <td><b>Sales Tax Calculator</b></td>
  </tr>
  <tr>
    <td><img src="https://github.com/user-attachments/assets/df238092-f1a5-40e5-9f2e-3d26f370f365" width="250"/></td>
    <td><img src="https://github.com/user-attachments/assets/9c42b16d-91ef-4d50-96f1-2c2203e4c5d4" width="250"/></td>
  </tr>
</table>

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## 📦 How to Install

1. Clone the repo:
   ```bash
   git clone https://github.com/Amritbhandari111/CGPA-Calculator-app-android.git
2. Open the project in Android Studio (Bumblebee/Arctic Fox or newer)

3. Run on a device or emulator (Android 6.0+)

🙌 Support This Project
If you like Smart Calculator Hub:

⭐ Star this repository on GitHub

📲 Try the app and share your feedback

🗳️ Vote for this app in exhibitions, contests, or tech fairs!

Your support motivates future updates and features ❤️

📧 Contact

Made with ❤️ by Amrit Bhandari
GitHub: @Amritbhandari111
Email: amritbhandari969@gmail.com