A new piece of smart jewelry might be the solution if you struggle to remember to reapply sunscreen or are concerned about sun damage. The90 Gem, a pendant necklace with a sensor that measures UVA and UVB exposure in real time, was introduced by The90, a wearable firm that promotes preventive skin health.

UVA rays can raise the risk of skin cancer and cause long-term skin aging. Sunburns can be caused by UVB rays, but over time, both forms of UV radiation can harm skin.

The pendant is paired with the The90 app, which analyzes real-time UVA and UVB data all day long. It converts that ambient exposure into proactive skin-care management rather than just alerting you to the sun's strength. The Gem feels more like a beauty-focused wellness item developed around prevention, even if it is essentially a sun health tracker.

Stacy Salvi, a specialist in wearable health technology and the person who oversaw Google's acquisition of Fitbit, created The90. In order to preserve healthy skin free from sun damage, Salvi sought to give women more control over their sun exposure statistics.

According to a representative for The90 who spoke to CNET, the necklace was created with women in mind because, according to the company's research, this group is typically already aware of sun protection.

"We found that women are both the most familiar with the benefits and risks of UV exposure and the most interested in finding ways to mitigate those risks," they said. However, The90 plans to expand its product line in the future to serve men and children as well.

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"The90 transforms sunscreen from a one-time morning ritual into an adaptive, responsive system built around your actual UV load," Salvi said in a press release.

The pendant collects UVA and UVB data, determines your skin type, whether you apply sunscreen, and whether you are wearing protective gear. The goal is to increase women's awareness and provide them with practical reminders regarding sun exposure, when to apply sunscreen, and good skin aging.

"Women are already investing in SPF, treatments, tools and routines to protect their skin, but when it comes to sun exposure, most of us are still guessing," said entrepreneur Lauryn Bosstick, one of The90's investors and podcast host and founder of The Skinny Confidential, in the press release.

The90 Gem is available now for $299, but there's an exclusive deal for $199 for The Skinny Confidential community.