# Duchenne - Smile Training App > Duchenne is a free Android app that helps people train themselves to smile naturally on demand using AI-powered feedback, daily challenges, and progress tracking. ## About Duchenne is designed for anyone who struggles to smile naturally for photos, interviews, or social situations. The app uses on-device AI to analyze smile authenticity and provide real-time feedback. Named after Guillaume Duchenne, the French neurologist who identified the genuine smile (involving both the mouth and eye muscles), our app trains users to activate their orbicularis oculi muscle alongside the zygomatic major. ## Key Features - **Real-Time AI Analysis**: Instant feedback on smile authenticity, symmetry, and muscle activation - **Daily Challenges**: 2-5 minute progressive training exercises - **Progress Tracking**: Detailed analytics and graphs showing improvement over time - **AI Coaching**: Personalized tips based on your unique facial structure - **100% Private**: All analysis happens on-device; photos never leave your phone - **Photo Training Mode**: Practice for selfies, professional photos, and video calls ## 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 - **Platform**: Android (8.0+) - **Price**: Free - **iOS**: Coming 2025 - **Download**: https://play.google.com/store/apps/details?id=com.dsdevelopment.duchenne ## Results Most users notice improvement within 1-2 weeks of consistent daily practice. Significant muscle memory changes typically develop after 3-4 weeks. ## Privacy Duchenne prioritizes privacy. All smile analysis is performed locally on your device. We never collect, access, or store your images or personal data. ## Contact - Website: https://duchenneapp.com - Support: support@duchenneapp.com ## Resources - Homepage: https://duchenneapp.com/ - Blog: https://duchenneapp.com/blog/ - Privacy Policy: https://duchenneapp.com/privacy.html - Terms of Service: https://duchenneapp.com/terms.html