Seamless Tracking
Everything you need to optimize your sun exposure safely, running quietly in the background. Discover the science behind Vitamin D.
Strava Integrated
Sync your runs
Connect your Strava account once. Every outdoor run, ride, or walk automatically logs your exact sun exposure time based on your route geometry.
Live geotracking
The UV index isn't static. We pull real-time, localized solar data based on your exact coordinates, adjusting minute-by-minute as clouds pass or elevation changes.
Tailored to your melanin
Generic advice is dangerous. Our algorithm uses your specific Fitzpatrick skin type and exposed surface area to calculate precise synthesis times, preventing burns while maximizing benefits.
