Features & Capabilities

3-day free trial! Automatically track vitamin D from sun exposure and supplements, get personalized recommendations, and optimize your health

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.

Why Vitamin D Matters Optimal vitamin D levels support natural energy, balanced mood, healthy sleep cycles, and radiant skin. With Rays’ precise tracking, you can maintain these benefits year-round without guesswork or overdoing it.

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.

For Tanners & Sun Enthusiasts Already spending time in the sun for a tan? Put that exposure to work. Rays tracks your cumulative UV dose so you can optimize your color, avoid overexposure, and know exactly where you stand — all automatically. Rays is perfect for health-conscious individuals who want optimal vitamin D without the guesswork.

Try Rays free for 3 days 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

User Growth & Download Statistics

App
By:
Rays Health Technologies LLC
Rating:
4.40
(7)
Version:
1.41 Last updated: 2026-05-27
Version code:
886076073
Creation date:
2025-09-18
Compatible devices:
Size:
56.65MB
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-11
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
Rays Health Technologies LLC
Apple Apps Store
https://apps.apple.com/us/app/rays-auto-vitamin-d-tracking/id6752499967
Website:
https://getrays.app/

User Reviews

Hit start button does nothing.
by ba*****, 2026-05-14

This app works so well and nicely laid out, very user friendly and does detect outdoor time auto which is such a nice feature! Also I had a question and emailed them and they replied so quick, they’re the most helpful and responsive I’ve ever seen! So excited to use this summer and the future of this app!
by bd*****, 2026-04-15

I’ve rarely thought about the impact of Vitamin D on my overall daily wellbeing - Rays has made it possible to get the most of my time. It’s simple, informative, and clean UI have led to major improvements in my overall happiness!
by Yo*****, 2025-12-12
View all user reviews ›

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