Health Tracker App

A Flutter mobile application for personal health data tracking. Allows users to record and monitor glucose levels, waist diameter, and body weight over time.

Key Features

• Health Metrics Registration: Capture glucose (mg/dL), waist diameter (cm), and body weight (kg)
• Local Storage: SQLite database for privacy and offline access
• Complete History: View all measurements ordered by date
• Smart Filtering: Organization by metric type and temporal grouping
• Offline Functionality: Complete features without internet connection
• Intuitive Interface: Clean design with tab navigation and quick data entry

Architecture

Layered Architecture

┌─────────────────────────────────────┐
│     Presentation Layer (UI)         │  ← Screens, Widgets
├─────────────────────────────────────┤
│   Business Logic Layer (BLoC)      │  ← State Management
├─────────────────────────────────────┤
│   Data Access Layer (Repository)   │  ← Data Abstraction
├─────────────────────────────────────┤
│   Data Storage Layer (SQLite)       │  ← Local Database
└─────────────────────────────────────┘

Design Patterns

HealthRepository

HealthTrackingBloc

Technical Decisions

SQLite as Local Database

• Reason: Data privacy, offline functionality, performance
• Implementation: Transactions for integrity, indexes for performance
• Schema: Single

  health_records

  table with typed fields and timestamps

Robust Data Validation

• Glucose: 0-1000 mg/dL
• Waist: 10-300 cm
• Weight: 1-1000 kg
• Validation at multiple layers: UI, Repository, and Database

Project Structure

lib/
├── blocs/                    # State and business logic
├── database/                 # Data access layer
├── models/                   # Data models
├── repositories/            # Data abstraction
├── screens/                  # User interfaces
├── services/                 # Auxiliary services
├── widgets/                  # Reusable components
└── main.dart                 # Entry point

Testing Strategy

Comprehensive Test Coverage (130+ test cases)

• Unit Tests: Models, Database, Repository, BLoC
• Widget Tests: Screens, Navigation, Components
• Integration Tests: End-to-end flows, Persistence, Offline mode

Code Coverage

Installation

git clone https://github.com/csparedes/health-tracker-app.git
cd health-tracker-app
flutter pub get
flutter run

Repository

GitHub Repository