Uv
Safe Sun Window: your sun timing, computed from published science — open for testing
Public-health apps tell you when to cover up. Almost nothing tells you the other half: how much sun your skin type can take today before burn risk, and what that means for the daily vitamin-D moment.…
read moreHow long can you actually stay in the sun? It depends on your skin type and today's UV
"Wear sunscreen when the UV index is high" is the advice everyone gives. It's also not a real answer to the question most people actually have: how long can I be outside right now before I need to…
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