SmartFit

iOS fitness app — personalized workouts, HealthKit stats, Firebase auth

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Overview

SmartFit tracks and improves workout habits through personalized goal-setting, equipment-aware exercise planning, and HealthKit-powered session stats. Users sign in via Google, define muscle-group targets, select gym machines, and view progress over time.

Features

Feature	Status	Technology
Google Sign-In	✅ Live	Firebase Auth + GoogleSignIn 7
Personalized goal setting	🔨 In progress	Custom PreferenceModel (chest, arms, legs, back, abs)
Machine selection	🔨 In progress	Life Fitness API
HealthKit stats (HR, calories, steps)	🔨 In progress	HealthKit framework
Progress charts	🔨 In progress	Apple Fitness framework
Workout reminders	📋 Planned	UserNotifications

Tech Stack

• Swift 6.3 — strict concurrency, async/await throughout auth flow, @MainActor UI isolation
• Firebase 11 — FirebaseCore + FirebaseAuth for credential management
• GoogleSignIn 7 — modern signIn(withPresenting:) async API, no delegate pattern
• HealthKit — per-session and aggregate stat collection
• CocoaPods (migrating to Swift Package Manager)

Architecture

SmartFit/
├── AppDelegate.swift           # @main entry, FirebaseApp.configure(), URL routing
├── LoginViewController.swift   # Google Sign-In (@MainActor, async/await)
├── ViewController.swift        # Main dashboard entry point
└── Models (planned)
    ├── PreferenceModel         # Body-area targets, goal weight/time
    ├── WorkoutStats            # Session aggregator
    └── MachineStats            # Per-machine DataTracker

Data Model

User
├── PreferenceModel
│   ├── chest / legs / arms / back / abs  (Int)
│   ├── goal_weight                       (optional)
│   └── goal_time                         (optional)
└── WorkoutStats
    ├── total_stats: DataTracker
    └── machine_stats: [MachineStatsModel]
        └── DataTracker
            ├── weight
            ├── heart_rate
            ├── calories_burned
            ├── time_duration
            └── steps

Getting Started

git clone https://github.com/CPF-17/SmartFit.git
cd SmartFit
pod install
open SmartFit.xcworkspace

Add GoogleService-Info.plist from your Firebase console (iOS app → Project Settings) before building.

Requirements: Xcode 16+, iOS 17+ deployment target, CocoaPods

Team

Built by CPF-17 at UC San Diego