Offline-Capable Flutter Attendance App Development

Develop a secure, offline-capable Flutter app that allows teachers to:

Log in using UserID + Password

Verify login using Google Authenticator (2FA)

Manage subject-wise attendance

View attendance analytics

Sync data online & offline

Core Features (Must-Have)
Authentication

UserID + Password login (NO email, NO phone)

Google Authenticator (TOTP 2FA)

Secure session handling

Teacher Dashboard

List of assigned subjects

Manual Refresh button (online sync)

Background auto-sync

Sync status indicator

Subject Dashboard

Attendance summary (Present / Absent %)

Bar chart showing count of attendance sessions per subject

Tabs: Daily / Weekly / Monthly

Buttons:

Take Attendance

Generate Report

Take Attendance

Student list or grid

Present / Absent toggle

Offline support

Save attendance locally

Sync when online

Reports

Student-wise report:

Student ID

Name

Present count

Absent count

Charts & Analytics

Bar chart using fl_chart

Subject-level attendance session counts

Dynamic update on refresh & sync

Sync & Offline

Offline-first design

Local storage (Hive / SQLite)

Background sync (WorkManager)

Sync on:

Manual refresh

Internet reconnect

Periodic background job

Tech Stack (Preferred)

Flutter (latest stable)

State management: Riverpod / Bloc / Provider

Charts: fl_chart

Local DB: Hive / SQLite

Backend: REST API