Rays: Auto Vitamin D Tracking

Rays: Auto Vitamin D Tracking

Auto sun exposure tracking

7 ratings
4 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • September 18, 2025
  • July 15, 2026
Rays: Auto Vitamin D Tracking screenshot #1 for iPhone
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About

Automatically tracks your body's vitamin D synthesis from sun exposure. Get personalized recommendations for optimal timing and duration to maintain energy, mood, and skin health year-round without manual logging.

Automatic vitamin D synthesis tracking
Personalized health intelligence
Smart sun exposure recommendations
Progress tracking and health insights
Apple Health integration
Minimal battery usage
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What's New in Rays

1.44

July 15, 2026

- Bug fixes

Subscription plans

Rays - Auto Vitamin D Tracker

Rays Automatic Vitamin D Tracking App

$19.991 Year
Price Updates
May 25, 2026$19.99
March 5, 2026$19.99
January 20, 2026$49.99
December 7, 2025$59.99
How to cancel Rays subscription ⁉️

Events

Read more about Summer Sun Challenge

Summer Sun Challenge

Build a 30-day vitamin D streak

Jul 15, 2026 Aug 15, 2026

User reviews

Doesn’t log

Hit start button does nothing.

Response from developer

Hey, we're so sorry you were experience this. There was a bug in that release that caused it. It should be resolved in our latest release submission (1.37). If you would like to reset your trial, please email us at team@getraysapp.com and we're happy to help! Hope you see the benefits of Rays.

Great

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!
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Game-Changer for daily wellbeing!

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!

5 star

I wish I had started tracking my Vitamin D levels sooner. I’m already seeing an improvement in energy thanks to Rays.

Developer apps

FAQ

Does Rays have ads?

No, Rays does not contain advertisements. It is designed to provide a seamless and uninterrupted user experience focused on your health.

How does Rays track vitamin D automatically?

Rays uses a combination of GPS, sensor data, movement analysis, and machine learning to detect outdoor exposure. It then analyzes your skin type, age, location, and lifestyle to estimate vitamin D synthesis without manual logging.

What are the subscription options for Rays?

Rays offers a 7-day free trial for all features. After the trial, subscriptions are available at $4.99 per month or $19.99 per year.

Can Rays sync with other health apps?

Yes, Rays seamlessly syncs with Apple Health. This allows for a more comprehensive view of your health data and automatically adjusts for seasonal variations.

What kind of recommendations does Rays provide?

Rays provides personalized guidance, such as suggesting optimal times and durations for sun exposure based on real-time UV index, cloud cover, and your individual synthesis rate.

Is Rays suitable for all skin types?

Yes, Rays' algorithm analyzes your skin type on the Fitzpatrick Scale (I-VI) to provide precise recommendations tailored to your individual needs and sun sensitivity.

How often is Rays updated?

The latest version of Rays is 1.30, and it was last updated on March 17, 2026. Updates typically focus on improving tracking accuracy, personalization algorithms, and user experience.

What devices does Rays support?

Rays is available for iPhone and iPod devices. It is designed for users who want to monitor their vitamin D levels conveniently on their Apple mobile devices.