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Hadirin featured image

Hadirin

UID: hadirin-001Completed

Mobile attendance app with on-device face recognition and geo-fenced check-in, built for verifiable, location-aware attendance records.

System Architecture

Flutter frontend with Firebase Auth for sessions and Firestore as the primary database. Face enrollment extracts a 128-d embedding on-device via MobileFaceNet and uploads the photo to Cloudinary, storing the vector in Firestore. At check-in, a live frame is processed through Google ML Kit for detection, then matched against the stored embedding using cosine similarity. Geo-fence validation runs client-side before the attendance record is committed to Firestore.

Performance Metrics

Face embedding comparison: ~250ms average on mid-range Android.

Geo-fence validation: <50ms.

End-to-end check-in flow: ~2.5s on stable connection.

Snapshots

Smart Face Recognition — enroll and check-in detail
Face enrollment and check-in detail.
Geo-fenced Attendance — check-in detail and config page
Check-in detail alongside the geo-fence.
Admin and User Roles — admin dashboard vs user home
Admin dashboard and user home.
Dark and Light Mode — attendance detail screen
Dark and light mode.
Role-Based Access — users list with role badges
Users list showing role badges.
Attendance History — user home with history list
User home with check-in history.