FitVerse
FitVerse combines real-time biometric tracking, an accelerometer-powered live form coach, a 93-exercise workout library, and a Gemini-powered AI coach - synced to the cloud so your progress follows you across devices.
Overview
Most fitness apps either lock real coaching behind a subscription or give you a library of exercises with no idea who you are. FitVerse builds a live profile of your body, your health conditions, and your workout history, then feeds that context straight into Google's Gemini model so every piece of advice - nutrition, recovery, muscle-building - is actually personalized. Biometrics come from Google Health Connect when available, with a self-built adaptive accelerometer pedometer as a fallback that keeps working even without a smartwatch. Everything is cached locally first for an instant UI, then synced to Firestore so a new device picks up your full history the moment you sign in.
Key Features
Personalized AI Coach (Gemini 2.5 Flash)
Context-aware chat using your profile, BMI, health conditions, and last 5 workout sessions with quick-prompt chips, persistent chat history, and bring-your-own API key support.
Live Form Tracking & Rep Counting
Accelerometer-based rep counting and form-quality scoring during resistance training with non-spammy spoken voice corrections via Flutter TTS and automatic AI workout reports.
Workout Library & Anatomical Map
20 muscle groups, 93 exercises, and 18 multi-exercise presets browsable via an interactive custom-painted body map with step-by-step instructions and animated previews.
Health & Activity Tracking
Automatic switching between Google Health Connect (5s refresh) and a self-built 20 Hz adaptive accelerometer pedometer fallback running via a foreground service.
Cross-Device Cloud Sync (Firestore)
Instant local caching via SharedPreferences combined with asynchronous Firestore sync, union-by-session-ID profile merging, and full offline persistence.
Home Dashboard
Live metric cards (heart rate, SpO2, steps, calories burned), 7-day activity bar chart (fl_chart), recent workout history, AI-generated nutrition banners, and real-time stats row recomputed live.
Tech Stack
| Framework | Flutter 3.19+ (Dart SDK ≥3.2.0) |
| State | provider ^6.1.2 (ChangeNotifier) |
| Auth | google_sign_in + firebase_auth ^5.3.1 |
| Database | cloud_firestore - offline persistence enabled |
| AI | google_generative_ai - Gemini 2.5 Flash |
| Health | health ^12.0.0 - Health Connect (Android) |
| Sensors | sensors_plus - accelerometer pipeline |
| Voice | flutter_tts ^4.0.2 |
| Charts | fl_chart ^0.68.0 |
Screenshots
