Know exactly when you've had enough sun.
Meet SunDose: a wearable UV tracker that displays your vitamin D progress through a stunning dragonfruit-inspired color gradient on your wrist. Using your skin type, location, and real-time UV index, we show you exactly when you've reached optimal sun exposure for vitamin D synthesis—without burning.
Look down at your wrist while walking outside and watch the band glow from white to pink to magenta dragonfruit colors in real-time as you soak up the perfect amount of sun—then feel it pulse when you've hit your daily vitamin D sweet spot.
Finally solve the universal problem of not knowing how much sun is enough. We calculate your optimal exposure based on your unique skin type, GPS location, and real-time UV index from weather satellites.
Your skin type, location, and real-time conditions combine to show exactly when you've reached optimal vitamin D synthesis without burning. No more guessing, no more sunburns, just perfect sun every time.