# Duchenne - Smile Training App

> Duchenne is a smile-training app with real-time AI coaching. It measures your eye crinkle, mouth lift, and symmetry to help you master the Duchenne Smile — the only genuine smile that reaches your eyes. Available on iOS (App Store) and Android.

## About

Duchenne is designed for anyone who struggles to smile naturally for photos, interviews, or social situations. The app uses on-device AI to analyse smile authenticity and provide real-time feedback.

Named after Guillaume Duchenne, the 19th-century French neurologist who identified the genuine smile (involving both the mouth and the orbicularis oculi muscle around the eyes), the app trains users to activate both muscle groups simultaneously.

## Key Features

- **Real-Time AI Coaching**: Instant feedback on smile authenticity, symmetry, and muscle activation
- **Eye-Crinkle Detection**: Tracks the orbicularis oculi — the muscle you can't fake
- **Daily Challenges**: 20+ unique 2–5 minute progressive training exercises
- **Event Prep Mode**: 7-day training windows for weddings, interviews, graduations and photos
- **Streaks & 31 Achievements**: Daily motivation and milestone tracking
- **Smile Gallery**: Auto-captured best smiles, browsable by month
- **100% On-Device Privacy**: All analysis runs locally; photos never leave your phone

## Who Benefits

- People who struggle to smile naturally
- Job seekers preparing for interviews
- Professionals needing confident headshots
- Content creators and influencers
- Anyone with camera anxiety
- Those wanting to improve social confidence

## Availability

- **iOS**: Live on the App Store (requires iOS 18+) — https://apps.apple.com/us/app/duchenne-ai-smile-coach/id6761304815
- **Android**: Android 8.0+ — https://play.google.com/store/apps/details?id=com.dsdevelopment.duchenne
- **Price**: Free tier with 2 sessions/day; Premium Monthly $3.99 / Yearly $24.99 / Lifetime $49.99

## Results

Most users notice improvement within 1–2 weeks of consistent daily practice. Significant muscle-memory changes typically develop after 3–4 weeks.

## Privacy

All smile analysis is performed locally on the user's device (Apple Vision framework on iOS, on-device ML on Android). Photos and camera data never leave the phone. Zero third-party analytics or tracking.

## Contact

- Website: https://duchenneapp.com
- Support: support@duchenneapp.com

## Resources

- Homepage: https://duchenneapp.com/
- iOS Landing: https://duchenneapp.com/apple/
- Android Landing: https://duchenneapp.com/android/
- Blog: https://duchenneapp.com/android/blog/
- iOS Privacy Policy: https://duchenneapp.com/apple/privacy.html
- iOS Terms of Service: https://duchenneapp.com/apple/terms.html
- Android Privacy Policy: https://duchenneapp.com/android/privacy.html
- Android Terms of Service: https://duchenneapp.com/android/terms.html