Muslim Mubarak: Islamic Companion App

I developed a comprehensive cross-platform solution addressing all religious and technical requirements: **React Native Cross-Platform Development** Built the application using React Native with Expo for rapid cross-platform deployment to iOS and Android. Achieved 95%+ code sharing while maintaining native performance for smooth Quran scrolling and compass animations. **Accurate Prayer Time Calculations** Integrated Adhan.js library for precise prayer time calculations supporting 10+ calculation methods. Implemented high-latitude adjustments (angle-based, one-seventh, middle of the night) for users in extreme northern/southern locations. **Qibla Compass Implementation** Built a smooth, responsive Qibla compass using device magnetometer data with noise filtering and calibration guidance. Implemented great circle calculation for accurate direction from any location on Earth. **Complete Quran Integration** Integrated complete Quran content with Arabic text, multiple translations (English, Turkish, Urdu, Indonesian, etc.), and verse-by-verse navigation. Implemented efficient virtualized list rendering for smooth scrolling through all 114 surahs. **AI-Powered Religious Assistant** Integrated OpenAI's GPT with carefully crafted system prompts grounded in authentic Islamic sources. The AI provides guidance on daily religious matters, explains Islamic concepts, and always encourages consulting qualified scholars for complex fiqh questions. **Firebase Backend Infrastructure** Used Firebase for user authentication, Firestore for user preferences and progress tracking, Cloud Functions for server-side operations, and Firebase Analytics for usage insights. **Offline-First Architecture** Implemented comprehensive offline support using AsyncStorage and local databases. Prayer times are pre-calculated for the month, Quran content is cached locally, and all core features work without internet. **Smart Prayer Notifications** Built a robust notification system using Expo Notifications with exact scheduling. Notifications are scheduled up to a week in advance and automatically rescheduled when the app is opened. **Hadith Collections** Integrated authenticated hadith collections from Sahih Bukhari and Sahih Muslim with search functionality, bookmarking, and categorization by topic. **Dhikr Counter & Tasbih** Created a digital tasbih with haptic feedback, multiple preset dhikr options, daily goals, and statistics tracking. Users can track their daily remembrance progress. **Islamic Calendar & Events** Integrated Hijri calendar with important Islamic dates, Ramadan countdown, and notifications for significant events. **Beautiful Islamic UI** Designed a calming, Islamic-inspired interface with appropriate colors (green, teal), Arabic calligraphy elements, and respectful imagery throughout the app.