
D3-Sync: Sun & Supplements
Optimize your vitamin D from sun and supplements
What it does
D3-Sync helps you optimize your vitamin D from two sources: sunlight and supplements. Estimate how much vitamin D your skin synthesizes based on sun exposure, log your supplement intake, and keep it all in one place — automatically synced to Apple Health. • Sun-based vitamin D estimates • Log supplements and dietary intake • HealthKit integration • Private: your health data stays on your device and iCloud Free on the App Store: https://apps.apple.com/us/app/d3-sync/id6772340133
Does the same job
all alternatives →

- IBI built a daily sunlight tracker2025 · lumehealth.io · ▲46
I kept trying to explain how important outdoor light is and how most people aren’t getting enough. Eventually I figured that showing is more effective than telling. So we built a free app that uses your Apple Watch or iPhone to automatically track your light exposure throughout the day. It tells you if you’re getting enough, shows you how consistent you are, and rewards habits that support hormone balance. It's in beta on TestFlight, let me know what you think!
MyVitaminsAppJun 2026 · mobileapps.andremoura.com · ▲4Precise Vitamin & Mineral Tracker for Apple Health


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