Most of us know that applying sunscreen is important – we’ve heard it time and time again. Still, on a day-to-day basis, we often rely on our instincts, habits, weather apps, or a generic UV index ...

There’s a new smart necklace on the market that tracks UV exposure: meet ‘The Gem’ from The90, a company founded by a former Fitbit executive, Stacy Salvi, who spent eight years at Fitbit before and ...