The Challenge
Plea is a health-tech startup on a mission to make health monitoring accessible to everyone. They needed both a mobile application for users to track their health data and a marketing website to drive sign-ups.
Core requirements:
- Cross-platform mobile app (iOS & Android)
- Secure health data storage and synchronization
- Integration with lab results APIs
- Clean, trustworthy design that instills confidence
- Marketing website with appointment booking
The Solution
I built a comprehensive digital ecosystem using Flutter for the mobile app to ensure consistent experience across platforms, while leveraging Firebase for real-time data sync and secure storage.
Mobile App Architecture
The Flutter app was structured with:
- BLoC Pattern - For predictable state management
- Repository Pattern - Clean separation of data sources
- Dependency Injection - Testable, modular code
- Offline-First - Local caching with background sync
Security Considerations
Given the sensitive nature of health data:
- End-to-end encryption for data in transit
- Secure enclave storage for sensitive tokens
- HIPAA-compliant data handling practices
- Biometric authentication support
Key Features
- Test Results Dashboard - Visual representation of health markers
- Trend Analysis - Track changes over time with intuitive charts
- Appointment Booking - Integrated scheduling for blood draws
- Notifications - Smart reminders for upcoming tests
- Export Reports - Share data with healthcare providers
Technical Highlights
Real-time Sync
Firebase Firestore enabled seamless data synchronization:
- Optimistic UI updates
- Conflict resolution
- Offline queue management
Performance Optimization
Achieved smooth 60fps animations through:
- Widget caching strategies
- Lazy loading of heavy components
- Image optimization pipeline
Results
The app launched successfully on both platforms:
- 4.8 star rating on App Store
- 10,000+ downloads in first month
- 92% user retention at 30 days
- Featured in App Store Health category
What I Learned
Building health-tech applications requires extra attention to data security and user trust. The investment in proper encryption and secure architecture was essential for user confidence and regulatory compliance.