Former Fitbit executive unveils new necklace that tracks UV exposure

It's called The Gem and there's an associated app with actionable guidance.

A company called The90 just announced a piece of smart jewelry called The Gem that is designed to help women keep an eye on real-time UV exposure. The company was founded by Stacy Salvi, who spent eight years with Fitbit both before and after the Google acquisition in 2021 .

The round necklace includes sensors that measure UVA and UVB rays. This data changes throughout the day as a person moves in and around sunlight. The Gem should provide a relatively accurate assessment of exposure, no matter if they are "walking outside" or "sitting near a sunny window."

This data is sent to an app which creates a personalized skin profile. The profile will provide actionable advice regarding personal UV thresholds, sunscreen reminders and sunlight exposure windows. Those UV rays are no joke, especially nowadays , so this type of thing could certainly come in handy during the summer months and beyond.

The company is calling this a new category of wearable and, well, that's technically true. There are plenty of UV sensors out there, from startups like Shade to known entities like L'Oreal . However, those aren't pendant necklaces. This one's a pendant necklace.

The Gem is available for purchase directly from the company right now and will eventually cost $300. However, early adopters can scoop one up for $200 for a limited time.