

D3-Sync: Sun & Supplements
Optimize your vitamin D from sun and supplements
Health & FitnessLaunched Jun 8, 2026
What is D3-Sync: Sun & Supplements?
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
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