Product Overview

Stepsio is a native iOS health tracking application built with SwiftUI that integrates with Apple HealthKit. It monitors steps, calories, heart rate, water intake, sleep cycles, and distance. The app uses OpenAI via Firebase Cloud Functions to generate health insights, and utilizes RevenueCat for subscription billing.

Technical Stack

• Frontend: Swift & SwiftUI (iOS 17.0+)
• Backend: Node.js Firebase Cloud Functions
• Database: Firebase Firestore
• Integrations: Apple HealthKit API
• AI Services: OpenAI GPT-4 API
• Monetization: RevenueCat SDK

Libraries & Dependencies (Swift Package Manager)

• firebase-ios-sdk (Firebase Auth, Functions, Firestore)
• purchases-ios-spm (RevenueCat)
• Glur (Visual background blurs)
• Alamofire (HTTP network routing)
• GoogleSignIn-iOS (Google OAuth Sign-In)

Core App Features

1. Apple HealthKit Integration

• Metrics Sync: Import steps, heart rate (BPM), active energy, sleep data, and distance.
• Home Screen Widgets: Widget extensions display daily progress.

2. AI Health Insights (Premium)

• AI Overview Card: Home screen card with loading shimmer, pulsing glow, and typing animations.
• Personalized GPT-4 Summaries: AI analyzes HealthKit metrics and generates feedback across categories (Summary, Tips, Goal Assessment, Insights).

3. Gamified Achievement Badges

• Milestones: Earn achievement badges across 3 levels (Beginner, Intermediate, Advanced) for step achievements.

4. Analytics Reports

• Weekly & Monthly Charts: Detailed activity graphs.
• History log: Scrollable historical log of metrics.

5. In-App Subscriptions (RevenueCat)

• Freemium Limits: Free users get 3 AI insights per week; subscribing unlocks unlimited insights, advanced analytics, and custom goals.
• Google & Apple Auth: Easy account authentication.