D vs Sun Tracker

Know exactly how much vitamin D you're getting. Every day. D-Fine tracks your vitamin D from three sources — sunlight, food, and supplements — and tells you if it's enough, based on your skin, your location, and the time of day. THE PROBLEM Vitamin D deficiency is one of the most common in the world, even among people who spend time outdoors. The issue isn't laziness. It's that no one can tell how much sun they actually need. It depends on where you live, the time of day, your skin type, what you're wearing. You can't figure that out by feel. THREE SOURCES, ONE NUMBER Until now, there was no way to see all the sources of vitamin D together. D-Fine combines sunlight, food, and supplements into a single daily figure — your IU today versus your personalized daily target. If you're taking a supplement, you'll finally know whether it's the right dose for you, today, in this season. WHAT D-FINE DOES Sunlight — D-Fine reads your time in daylight from your iPhone and Apple Watch, then calculates the IU your skin actually synthesized, factoring in UV index, sun angle, cloud cover, your Fitzpatrick skin type, how much skin is exposed, and any SPF you logged. Food — Log meals containing vitamin D. D-Fine adds the IU to your daily total. Supplements — Track your daily supplement dose. D-Fine warns you before you cross safe thresholds. WHO IT'S FOR People who live far from the equator, work indoors, have darker skin, are over 50, or just want to stop guessing. PRIVACY All processing happens on your device. Your profile syncs through your private iCloud container — only you can read it. Anonymous usage data is strictly opt-in (default OFF), uses a non-persistent install ID, and contains no Apple identifiers or personal information. APPLE WATCH With an Apple Watch, D-Fine measures your Time in Daylight continuously and passively, the way Apple intended. Without it, the app falls back to estimating from outdoor workouts and UV conditions — still useful, just less precise. D-Fine is not a medical device. It's a science-based calculation tool to help you understand your vitamin D intake. For medical concerns, talk to your doctor. Privacy Policy: https://d-fine.app/privacy Support: https://d-fine.app/support

Discover a smarter way to enjoy the sun with Sun Tracker: UV & Vitamin D — the intelligent sunlight companion designed to help you optimize sun exposure, monitor UV levels, and support healthy Vitamin D production while staying safe. Whether you love sunbathing, outdoor fitness, beach activities, walking, hiking, or simply want to improve your wellness routine, Sun Tracker gives you the real-time tools and insights you need to make better sunlight decisions every day. Unlike ordinary weather apps, Sun Tracker focuses specifically on safe and effective sun exposure. The app combines real-time UV index monitoring, exposure timing, location-based solar tracking, and personalized recommendations to help you benefit from sunlight without overexposure. REAL-TIME UV INDEX TRACKING Monitor live UV index levels based on your current location and time of day. Instantly understand sunlight intensity and know when UV conditions are safe, moderate, high, or dangerous. Get smarter insights about: • UV intensity • Sunlight conditions • Daily UV forecasts • Outdoor exposure safety ⏱ SMART SUN EXPOSURE TIMER Avoid excessive sunlight exposure with intelligent timing tools designed for safer sunbathing and outdoor activities. The app helps you: • Estimate safe exposure duration • Track sunbathing sessions • Receive exposure reminders • Reduce the risk of overexposure and sunburn VITAMIN D OPTIMIZATION Sunlight plays a major role in natural Vitamin D production. Sun Tracker helps you maximize sunlight benefits more effectively by identifying optimal exposure windows throughout the day. Perfect for users who: • Want healthier sunlight habits • Need help optimizing daily sun exposure • Enjoy outdoor wellness routines LOCATION-BASED SUN DATA Get accurate sunlight information customized for your geographic location. Track: • Sunrise time • Sunset time • Solar noon • Daylight duration • Local UV conditions Whether you are at home, traveling, at the beach, or outdoors, the app adapts to your location automatically. UV ALERTS & SUN SAFETY Stay protected with smart alerts and notifications designed to help reduce harmful UV exposure. Features include: • High UV warnings • Exposure notifications • Smart reminders • Safer outdoor planning TRACK YOUR SUN HABITS Build healthier sunlight routines with exposure tracking and activity monitoring. Monitor: • Daily exposure sessions • Sunlight trends • Outdoor activity patterns • Personal progress over time PERFECT FOR • Sunbathing enthusiasts • Outdoor fitness lovers • Beachgoers • Athletes • Walkers and hikers • Wellness-focused users • People monitoring sunlight exposure WHY USERS LOVE SUN TRACKER • Simple and clean interface • Accurate UV tracking • Helpful sunlight insights • Smart exposure guidance • Fast and lightweight experience Sun Tracker makes it easier to enjoy the benefits of sunlight while helping you stay aware of UV conditions and safer exposure practices. Download Sun Tracker today and enjoy smarter, safer, and more informed sun exposure every day. DISCLAIMER: This app provides general informational guidance only and does not replace professional medical advice, diagnosis, or treatment. Our Terms of use and Privacy policy for the app can be found below: Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://sites.google.com/view/suntrackerpolicy/home