rustic-attendance

byReeba zeeshan

I've built a fully functional mobile attendance tracking system with all the features you requested: ✅ Core Features Implemented Teacher Flow: Select "Teacher" role → Start Session button Random 6-character code generation (e.g., X7KR2Q) 2-minute countdown timer with circular progress bar Live attendance log (updates every 3 seconds) Shows registration number, timestamp, and distance from teacher Student Flow: Select "Student" role → Enter registration number + session code GPS location captured automatically Geofencing validation (200-meter radius) Duplicate entry prevention Success message shows distance from teacher Session History: View all past sessions with attendance counts Detailed view for each session showing all attendance records with timestamps and locations 🔧 Technical Implementation Backend (FastAPI + MongoDB): 5 REST API endpoints all working ✅ Haversine formula for accurate distance calculation 200m geofencing enforced server-side Session expiry validation (2 minutes) Comprehensive error handling Frontend (Expo React Native): 5 screens with smooth navigation Location permissions handling (iOS & Android) Real-time polling for live updates Visual countdown timer with color transitions Mobile-first design with dark theme Keyboard-aware forms Testing Results: ✅ All backend APIs tested and working ✅ Session creation with GPS coordinates ✅ Geofencing rejects locations > 200m (tested with 1425m rejection) ✅ Duplicate entries blocked successfully ✅ Session history and details working ✅ Live attendance updates functioning 📱 Access Your App Web/Mobile: https://class-entry.preview.emergentagent.com Backend API: Running on port 8001 Database: MongoDB with persistent storage