Vitamin D Sun Tracker & UV
UV Index, Sunburn & SPF Timer
About
This app personalizes your sun exposure to optimize vitamin D production and prevent sunburn. It uses your location, skin type, and real-time atmospheric data to determine the best times to be in the sun and when to cover up. Integrates with Apple Health and Apple Watch for seamless tracking.
What's New in Vitamin D Sun Tracker & UV
1.6
October 3, 2026
• Watch the live map draw your walk while a session runs • A new session screen with your route, vitamin D, UV and skin charts • Add a past session by hand when your phone stayed at home • Turn on Watch Auto-Track and your Time in Daylight becomes sessions • Family: bring your partner and kids along, each with their own vitamin D • Vitamin D Level: an estimate of your blood level, sharper with every blood test • Winter Plan: when the sun stops making vitamin D in your city • Weekly and monthly summaries, a PDF report for your doctor and CSV export • More is free: supplement log, UV alerts and tomorrow's sun chart
MoreSubscriptions & In-App Purchases
Premium Yearly
Best value: full year of solar insights.
Developer apps
FAQ
Does Vitamin D have ads?
No, Vitamin D is ad-free. The app is designed to provide a clean and quiet experience focused solely on your data.
What are the subscription options for Vitamin D?
Vitamin D offers a Premium Weekly subscription for $4.99 and a Premium Yearly subscription for $149.99. These plans likely unlock additional features or content.
How accurate is Vitamin D's UV index calculation?
Vitamin D uses astronomy and live atmospheric data, including sun angle, ozone density, and air clarity, for precise UVB estimation at your GPS location, going beyond generic UV index readings.
Can I use Vitamin D on my Apple Watch?
Yes, Vitamin D is built for Apple Watch with features like window complications for your watch face, haptic alerts for optimal sun times, and live progress tracking.
Does Vitamin D integrate with Apple Health?
Yes, Vitamin D integrates with Apple Health. Your vitamin D from the sun and time spent in the sun are automatically logged, providing a complete picture for your other health apps.
Is Vitamin D suitable for all skin types and locations?
Yes, Vitamin D is designed to be personal by considering your skin type (Fitzpatrick scale) for burn avoidance and is accurate anywhere on Earth, with special attention to northern regions and short winter days.
How often is Vitamin D updated?
The latest version of Vitamin D is 1.2, and it was last updated on June 25, 2026. This indicates a recent update and ongoing development.
What is the age rating for Vitamin D?
Vitamin D has an age rating of 4+. This suggests it is suitable for a wide range of users, including children, with no mature content.
