BMI Calculator App

A simple and interactive Flutter application to calculate and interpret Body Mass Index (BMI). The app supports dynamic themes (light/dark mode), allows users to input their details (gender, age, height, and weight), and provides BMI results with interpretations tailored for both adults and children.

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Features

• Dynamic Light/Dark Mode: Users can toggle between light and dark themes for a personalized experience.
• Gender Selection: The app allows users to select their gender for more accurate interpretation of BMI results.
• Age and Child-Specific Interpretation: The BMI calculation considers both age and gender to provide interpretations for adults and children.
• Smooth Navigation: Includes a loading screen before displaying results to enhance the user experience.
• Simple and Intuitive UI: A clean design for easy input and understanding of BMI results.
• Proper Error Handling: The app validates user input and displays error messages for incorrect data.
• About BMI: Additional information about BMI and its significance for health.
• Responsive Design: The app is designed to work on both Android and iOS devices.

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Screenshots

Home Screen	Navigation Bar	Result Screen	About BMI

Light Mode	Dark Mode

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How to Use the App

1. Enter your age, weight (in kg), and height (in cm).
2. Select your gender using the radio buttons.
3. Press the Calculate BMI button.
4. Wait for the loading screen to display your result.
5. View your BMI and interpretation on the result screen.

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Technologies Used

• Flutter: Cross-platform development framework.
• Dart: Programming language used with Flutter.
• Material Design: UI components to build a visually appealing app.

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How BMI is Calculated

Example Calculations:

• COnsidering Adult Male (25 years, 178 cm, 69.8 kg):
  • BMI = 24.2 (Normal weight)
• Considering Adult Female (35 years, 162.5 cm, 59.9 kg):
  • BMI = 22.1 (Normal weight)
• Considering Child (10 years, 142.5 cm, 38.6 kg):
  • BMI-for-age percentile = 50th percentile (Normal weight)

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Project Structure

lib/
|-- main.dart
|-- BMIScreen.dart        # Home screen for inputting details
|-- BMIResultScreen.dart  # Result screen showing BMI and interpretation
|-- AboutBMI.dart         # Additional information about BMI
|-- NavBar.dart           # Navigation bar for app-wide navigation

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How to Run the Project

1. Clone this repository:

   git clone https://github.com/Manraj29/bmi-calculator-app.git

2. Navigate to the project directory:

   cd bmi-calculator-app

3. Install dependencies:

   flutter pub get

4. Run the app:

   flutter run

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