Healthy Weather
Weather focused on your health.
Vitamin D₃ forecasts, UV index, and sun safety — now in the App Store.
How it works
Healthy Weather uses your device location to show a personal Vitamin D₃ forecast for where you are — no manual input needed. See when your Vitamin D₃ window opens, check the UV and sun-risk outlook, and track sun exposure over time so you know when to get outside.
Why Vitamin D₃ matters
Most people run low on Vitamin D₃ in winter when days are short and the sun sits low in the sky. Sunlight is the most efficient natural source — and timing matters: the same UV index at noon produces far more Vitamin D₃ than at sunrise or sunset.
New here? Our vitamin D₃ & sun guides answer the basics — can I make vitamin D₃ right now? and how much sun do I need?
Features
- Personalized IU tracking
- UV index + 7-day forecast
- Sun safety timer