What is Posey?
Posey is a judgment-free AI fitness coach for introverts and beginners. Real-time pose detection and voice coaching guide your form â personalized plans and rep counting, all powered by AI.
Not a louder coach. A kinder start.
The Problem We Solve
- 50% of new gym members quit within 6 months, often citing intimidation and lack of guidance
- Personal trainers cost $50â150/hour â inaccessible for most people
- Fitness apps give you videos to follow, but never tell you if you're doing it right
Posey is a judgment-free AI coach that watches your form, understands your goals through conversational onboarding, and coaches you with warmth and encouragement.
How It Works
Pose Detection
Real-time joint tracking and angle analysis. See your form with skeleton overlay and get instant feedback on squats, push-ups, curls, and more.
Voice Coaching
AI coach speaks directly to you during workouts. Get form cues, rep counts, and encouragement powered by Gemini Live API.
Training Plans
Personalized workout plans based on your goals. Rest tracking, exercise detection, and adaptive guidance.
Key Features
- Real-time pose detection â 19 keypoints at 30fps, skeleton overlay, on-device rep counting
- Auto exercise detection â no manual selection needed; AI identifies exercises from visual + pose context
- Form analysis â joint angles (knees, elbows, hips, shoulders, torso) for biomechanical feedback
- Fatigue detection, AI-powered onboarding, text subtitles for AI responses
Built With
Swift & SwiftUI
Native iOS experience with Apple Vision framework.
QuickPose
Real-time pose estimation and joint tracking.
Gemini Live API
Bidirectional streaming for real-time voice coaching.
Firebase
Backend infrastructure and deployment.
Technical Highlights
- True real-time multimodal AI â watches and responds within seconds
- Sub-200ms audio latency â coaching feels immediate
- Zero exercise configuration â AI auto-identifies your movement
- Production deployment â one-command Cloud Run with proper auth
Coming Soon
- Workout history â track progress and celebrate milestones
- Apple Watch integration â heart rate for fatigue detection
- Offline mode â on-device models for gyms with poor connectivity
- Form scoring â quantitative feedback per rep
Try Posey
Posey is coming soon to the App Store. Sign up for updates on the Posey website.
Health, movement, and confidence should not belong only to the people who already have them. They should belong to everyone. Sometimes, what people need is not a louder coach. They need a kinder start. That's Posey.