Rays: Auto Vitamin D Tracking

Never Worry About Vitamin D Again
Over 1 billion people are vitamin D deficient, but knowing if you're getting enough sun shouldn't be complicated. Rays is the world's first app that automatically tracks your vitamin D synthesis, so you can spend your time enjoying life. No manual logging, no thinking required.

Automatic Vitamin D Tracking
Rays uses a first-of-its-kind outdoor detection system combining GPS precision patterns, sensor data, movement analysis, and personalized machine learning that adapts to your routines. With high accuracy and minimal battery usage, it works seamlessly in the background without any manual input.

Personalized Health Intelligence
Our algorithm analyzes your skin type (Fitzpatrick Scale I-VI), age, geographic location, supplement intake, and lifestyle factors. Based on Endocrine Society Clinical Practice Guidelines, we provide recommendations as precise as your doctor's, but as convenient as checking the weather.

Smart Recommendations
Receive personalized guidance like "Get 18 minutes at 11 AM tomorrow" based on real-time UV index, cloud cover, solar positioning, and your personal synthesis rate. Our intelligent engine suggests optimal timing when UV will be 2-3x more efficient for vitamin D production.

Advanced Progress Tracking
Monitor your vitamin D synthesis with detailed weekly charts, streak tracking, and comprehensive health insights. Seamlessly syncs with Apple Health and automatically adjusts for seasonal variations while preventing excessive intake when combined with supplements.

Privacy Protected
Your privacy is protected through geohash clustering technology that never stores exact coordinates. All location sharing is controlled through standard device permissions with on-device processing.

Rays is perfect for health-conscious individuals who want optimal vitamin D without the guesswork.

Try Rays free for one week with full access to all features.

Terms of Use: https://getrays.app/eula
Privacy Policy: https://getrays.app/privacy
Health Disclaimer: https://getrays.app/health-disclaimer