Respira is a mindfulness application designed to help users reduce anxiety and improve focus through guided breathing techniques. Built with modern Android architecture, it features a responsive UI that adapts seamlessly to any device orientation.

Portrait Mode	Landscape Mode

• Dual Breathing Modes:
  • 4-7-8 Relax: A proven technique for anxiety reduction (Inhale 4s, Hold 7s, Exhale 8s).
  • Box Focus: A Navy SEAL technique for concentration (4s Inhale, 4s Hold, 4s Exhale, 4s Hold).
• Responsive Design: optimized layouts for both Portrait (Stacked) and Landscape (Split-Screen) using ConstraintLayout.
• State Preservation: The timer and breathing phase persist through screen rotations without resetting.
• Visual Feedback: A custom circular progress bar animates smoothly to guide the user's breath.

This project follows the Model-View-ViewModel (MVVM) architectural pattern to ensure separation of concerns and testability.

• ViewModel (TimerViewModel.kt): Handles all business logic, including the countdown timer, state management, and the 4-7-8 logic chain. It uses LiveData to expose state to the UI.
• View (MainActivity.kt): Responsible only for rendering the UI. It observes the ViewModel and updates the text/progress bar automatically.
• ViewBinding: Replaces findViewById for null-safe, type-safe view interaction.
• String Resources: All UI text is extracted to strings.xml to support localization and maintainability.

Building Respira was a deep dive into Android lifecycle management and UI design. Key takeaways include:

1. ConstraintLayout Mastery: I learned how to use Chains (packed, spread), Guidelines, and Bias (layout_constraintVertical_bias) to create complex layouts that work on any screen size.
2. The Power of LiveData: I discovered how LiveData solves the "rotation problem" by keeping data alive even when the Activity is destroyed and recreated.
3. Logic Chaining: Implementing the "4-7-8" loop required chaining multiple CountDownTimers together, teaching me how to manage asynchronous callbacks effectively.
4. Clean Code: Moving logic out of the Activity and into the ViewModel made the code much easier to read and debug.

I plan to continue improving Respira with these features:

• Daily Reminders: Implement WorkManager to send a gentle notification at 9:00 AM reminding the user to take a breath.
• Haptic Feedback: Add subtle vibrations during phase changes (e.g., a small buzz when switching from "Inhale" to "Hold") so users can practice with their eyes closed.
• Progress Tracking: Save session data using Room Database to show users a "streak" of how many days they have practiced.
• Dynamic Themes: Allow users to switch between "Sage Green," "Ocean Blue," and "Sunset Orange" themes.