Prayer Times & Qibla — Astronomical Offline Utility

Prayer Times & Qibla is a high-performance, offline-first mobile utility engineered in Flutter and Dart, built for worldwide Muslim users requiring dependable spiritual schedules with zero mandatory internet dependency.

The application combines mathematical astronomical algorithms for location-based prayer timing, real-time sensor fusion for accurate Qibla compass orientation, and an embedded SQLite FTS5 database enabling instant full-text search across the entire Qur'an alongside synchronized audio recitations.

Lead Flutter Developer responsible for astronomical calculation math, device magnetometer and gyroscope sensor fusion, SQLite FTS5 indexing, audio streaming/caching with Just Audio, and offline architecture.

• Pure Dart astronomical calculation engine computing prayer times locally based on latitude, longitude, and elevation.
• Sensor fusion algorithm reading device magnetometer and accelerometer data with low-pass noise filtering for smooth compass rotation.
• Embedded SQLite database with Full-Text Search (FTS5) extension delivering sub-10ms query results across Arabic text and translations.
• Audio playback pipeline with Just Audio supporting background recitation, byte-range streaming, and local caching.
• Hive local key-value store for user bookmarks, recitation progress, and calculation preferences.

• Astronomical Calculation Engine: Precise Fajr, Dhuhr, Asr, Maghrib, and Isha timings with support for all major calculation conventions.
• Real-Time Qibla Compass: Smooth animated compass dial pointing directly toward the Kaaba using live GPS coordinates and magnetic sensor calibration.
• FTS5 Searchable Holy Qur'an: Instant keyword search across Arabic verses, English translations, and phonetic transliterations.
• Synchronized Audio Recitation: Verse-by-verse audio playback with highlighting and offline download management.
• Localized Adhan Alerts: Background system alarms that wake the device and trigger acoustic reminders at exact prayer intervals.
• Customizable Islamic Calendar: Hijri date tracking with moon phase calculation and major observance notifications.

• Correcting for magnetic declination and sensor drift on varied budget Android devices to ensure the Qibla compass points accurately.
• Indexing complex Arabic script with diacritics in SQLite FTS5 without degrading database file size or search performance.
• Guaranteeing scheduled background prayer alarms fire reliably across aggressive OEM battery optimization software (MIUI, Samsung OneUI).

• High-speed utility app fully operational without cell connectivity or data usage.
• Sub-second launch time with zero cold-start delay due to pre-compiled local database assets.
• Complete video demonstration publicly accessible on YouTube.