CallMaster Pro App Development

Project Overview
• App Name: CallMaster Pro (or your preferred name)
• Platform: Flutter (Android & iOS)
• Deliverables:
o Complete source code
o Comprehensive documentation
o Automated tests
o CI/CD setup (Flutter Local Authentication using Biometrics – Face ID, Touch ID ..., How to Read Data from Google Sheets in Flutter? - YouTube, How to build Flutter in GitHub Actions CI/CD - Stack Overflow)
Primary Goals:
1. Implement robust user authentication adhering to security best practices, including biometric authentication using the local_auth package .
2. Enable real-time call logging, statistics, and recordings. Note: Implementing call recording in Flutter may require platform-specific native code, as Flutter's capabilities are limited in this area .
3. Seamlessly integrate with Google Sheets and Google Drive using packages like gsheets and googledrivehandler .
4. Design a top-tier UI/UX with animations, transitions, theming, and accessibility considerations.
5. Ensure production readiness through performance tuning, comprehensive testing, and a robust deployment pipeline. (Biometric Authentication in Flutter: Unlock Your App with Face ..., How can I implement call recording in a Flutter app?, gsheets | Dart package - Pub, googledrivehandler | Flutter package - Pub)
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Authentication & Onboarding
• Landing / Welcome Screen:
o Clean design featuring the app logo, tagline, and Login/Register buttons.
o Optional animated background or Lottie animation. (Add multi-factor authentication to your Flutter app - Firebase)
• Registration Flow:
o Fields: Full Name, Email, Phone Number, Password, Confirm Password, Role/Designation.
o Email & Phone Verification (OTP via SMS & email link).
o Customizable consent screens for privacy & terms of service.
• Login Flow:
o Fields: Email or Phone + Password.
o Two-Factor Authentication (TOTP or SMS OTP) using Firebase .
o Biometric Login (FaceID / TouchID) fallback using local_auth . (How to build Flutter in GitHub Actions CI/CD - Stack Overflow, Implementing face recognition and authentication in Flutter)
• Password Reset:
o Secure tokenized reset link via email.
o In-app password change with validation and strength meter.
• Demo Testing:
o Include a "Demo Testing" button to allow users to enter the app without login/register for testing purposes.
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Main Navigation & Structure
• Bottom Navigation Bar with four tabs:
1. Home (Call Logs)
2. Statistics (Charts & Metrics)
3. Recordings (Playback & Download)
4. Profile & Settings (Good practice, integration google drive API - FlutterFlow Community)
• Global Drawer (optional) for:
o Dark Mode toggle
o Language switch
o Help & Feedback (Biometric Authentication in Flutter: Unlock Your App with Face ..., Implementing Biometric Authentication in Flutter Apps)
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Home / Call Logs
• Data Model:
o Caller Number, Contact Name, Date & Time, Duration, Type, SIM ID.
• Features:
o Infinite scroll list with pull-to-refresh.
o Search Bar (by name or number) with debounced input.
o Date Range Filter with presets (Today, Week, Month) + Custom.
o Realtime Sync: New logs auto-upload to Google Sheets via gsheets .
o Offline Queue: Cache logs when offline and sync when reconnected. (gsheets | Dart package - Pub)
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Call Statistics
• Metrics & KPIs:
o Total/Incoming/Outgoing/Missed/Rejected/No-Connect calls
o Total & Average Duration
o Filters: SIM type, Date range
• Visualizations:
o Utilize syncfusion_flutter_charts for bar, pie, and line charts .
o Interactive tooltips, legends, and drill-down capability.
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Call Recordings
• List View:
o Display timestamp, caller info, and duration badge.
• Playback Controls:
o Play, pause, seek, and adjust playback speed.
• Download & Share:
o Save recordings locally or share via native dialogs. (Implementing Biometric Authentication in Flutter Apps)
• Auto-Upload:
o Push recordings to Google Drive in the background using googledrivehandler . (googledrivehandler | Flutter package - Pub)
• Permissions Handling:
o Manage runtime audio & storage permissions with graceful fallbacks. (Implementing Biometric Authentication in Flutter Apps)
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Profile & Settings
• User Profile:
o Avatar (camera/gallery upload with cropping), name, role, contact info.
• App Settings:
o Theme: Light / Dark / System
o Language: Internationalization with JSON/ARB files (English + at least one additional locale)
o Notifications: Enable/disable push notifications for new calls & reminders
o Security: Change password, manage 2FA methods (gsheets | Dart package - Pub)
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Advanced & Optional Features
• Push Notifications:
o Implement via Firebase Cloud Messaging for incoming calls or reminders.
• In-App Analytics:
o Track user engagement and feature usage using Firebase Analytics.
• Accessibility:
o Ensure screen reader labels, scalable fonts, and color