Jack Dorsey launches Sun Day app to track UV exposure and Vitamin D levels using real-time UV and skin data; here’s how it might benefit you

Jack Dorsey has launched Sun Day, a new iOS app that tracks Vitamin D synthesis using real-time UV data. The app estimates Vitamin D production based on location, skin type, and sun exposure, offering personalized insights to optimize sunlight exposure and prevent deficiencies. This open-source project reflects a growing trend in AI-powered health tools for improved well-being.

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