SunSprite is a next-generation health wearable invented by Harvard doctors that tracks your sun and bright light exposure. Bright light is clinically proven to improve your energy, mood, and sleep, but most Americans aren't getting enough. Plus it's hard to track - your eyes can't accurately measure light, and UV is invisible. SunSprite tracks it all for you, and syncs with your iPhone (4S or newer), empowering you to be healthier. We know tracking makes a difference: 69% of people who track activity become significantly healthier.