Get the good out of the sun. Own your light.

★★★★★ 4.8 · Based on 486 early-access reviews

Personal Sun Intelligence

Buy Now $299

“I Don’t Put My Name On Anything I Don’t Fully Believe In.”

✦ World Renowned UV Specialist & Dermatologist

The90 turns the light your skin actually gets into one daily Sun Score from 0 to 100

the vitamin D and morning light you want, without the aging and burning you don’t.

The90 turns the light your skin actually gets into one daily Sun Score from 0 to 100: the vitamin D and morning light you want, without the aging and burning you don’t. Aim for The90.

Get the highlights.

Personalized to your skin recommendations based on your unique skin profile, genetics, habits, and sensitivities.

Personalized to your skin recommendations based on your unique skin profile, genetics, habits, and sensitivities.

Personalized to your skin recommendations based on your unique skin profile, genetics, habits, and sensitivities.

Slide 1 of 4

Personalized to your skin recommendations based on your unique skin profile, genetics, habits, and sensitivities.

Personalized to your skin recommendations based on your unique skin profile, genetics, habits, and sensitivities.

Personalized to your skin recommendations based on your unique skin profile, genetics, habits, and sensitivities.

Slide 1 of 4

Meet your personal sunlight guide.

The90 is a personal sun intelligence system. A jewelry-grade sensor and a connected app measure the Personal UV your skin actually gets, then turn it into one number you can act on.

The jewelry-inspired UV sensor that tracks what your skin actually experiences, so you can protect how you age while harnessing the health benefits of the sun.

Finishes

Not afraid to take a splash

This remarkable design is built for your everyday with water resistance and a concave design that minimizes scratches.

Water Resistance

Тут про аксесуары клип и кепку

Monitor UVA exposure (rays linked to premature photoaging and long-term skin damage) even when you can’t feel or see it.

Switch. Easier

Track what silently adds up

The90 Gem was designed as a timeless piece of jewelry women actually want to wear. Elegant, customizable, and made to fit every moment.

Jewelry Design

Track what silently adds up

Monitor UVA exposure (rays linked to premature photoaging and long-term skin damage) even when you can’t feel or see it.

Advanced Sensors

The jewelry-inspired UV sensor that tracks what your skin actually experiences, so you can protect how you age while harnessing the health benefits of the sun.

Finishes

Track what silently adds up

The90 Gem was designed as a timeless piece of jewelry women actually want to wear. Elegant, customizable, and made to fit every moment.

Jewelry Design

Not afraid to take a splash

This remarkable design is built for your everyday with water resistance and a concave design that minimizes scratches.

Water Resistance

Track what silently adds up

Monitor UVA exposure (rays linked to premature photoaging and long-term skin damage) even when you can’t feel or see it.

Advanced Sensors

Тут про аксесуары клип и кепку

Monitor UVA exposure (rays linked to premature photoaging and long-term skin damage) even when you can’t feel or see it.

Switch. Easier

You felt nothing. Your skin recorded this.

UV exposure and skin protection is personal.

Your skin, your genetics, your day in the sun: no two people get the same UV, so a single Index number or a blanket SPF rule can’t tell you what’s actually reaching you. Up to 90% of visible skin aging comes from UV, and most of it happens when you aren’t paying attention. The Gem measures your real exposure and reads it against your skin, in real time.

Why 90%? →

Your very own light dashboard.

See all your insights at a glance with The90 app. Think of it as a convenient hub for all your skin wellness info from sleeping to vitamin D.

Create your skin profile

The90™ app walks you through a series of questions that help us build your specific skin profile. Genetics, habits, and sensitivities all play a role in how your skin reacts to the sun.

Track UVA & UVB

Know exactly what rays have hit your skin throughout the day, and what that means for your specific skin type. This way you can apply sunscreen or cover up before you burn, and get insights on what you can do to mitigate the aging effects of the sun.

Harness the benefits

We know now more than ever that the sun is vital to our health. With The90™ you can track these benefits like Vitamin D production, so you can maximize the benefits without risking damage from harmful UVA rays.

Feels like nothing. Goes with everything.

Monitor UVA exposure (rays linked to premature photoaging and long-term skin damage) even when you can’t feel or see it.

Know your sunburn window

See your estimated time to burn based on real-time UVB exposure (rays that cause sunburn), sunscreen use, and skin profile.

Track what silently adds up

Monitor UVA exposure (rays linked to premature photoaging and long-term skin damage) even when you can’t feel or see it.

Get your score. Own your ligh.

See all your insights at a glance with the Samsung Health app. Think of it as a convenient hub for all your wellness info from sleeping to fitness.

Create your skin profile

The90™ app walks you through a series of questions that help us build your specific skin profile. Genetics, habits, and sensitivities all play a role in how your skin reacts to the sun.

Track UVA & UVB

A fast black sports car races down the highway.

A picture of your day in the ligh. POV: your day in the ligh.

Observe heart activities for overall health with Galaxy Watch. Then, Samsung Health Monitor along with Samsung Health will provide valuable insights.

Golden Hour

“The team’s ability to transform ideas into stunning visuals is unmatched on many levels. Every project feels like a work of art with purpose.”

— Liam Carter, Creative Director

An orange cube-shaped side table is shown.

A picture of your day in the ligh. POV: your day in the ligh.

Observe heart activities for overall health with Galaxy Watch. Then, Samsung Health Monitor along with Samsung Health will provide valuable insights.

Golden Hour

“The team’s ability to transform ideas into stunning visuals is unmatched on many levels. Every project feels like a work of art with purpose.”

— Liam Carter, Creative Director

Designed to Go Wherever You Do

Made to look as good as it performs, The90™ Gem blends seamlessly into your everyday jewelry stack, so you can wear it from workdays to workouts to weekends in the sun and everything in between.

Indoor

Indoor

Outdoor

Outdoor

Active

Active

Lounging

Lounging

What our first wearers are saying.

★★★★★ 4.8 · Based on 486 early-access reviews

★★★★★

“I finally understand why my melasma flares in the car. The Gem caught UVA I never felt.”

Maya R. · Early access reviewer

★★★★★

“It looks like jewelry, not a gadget. My friends ask about the pendant before they ask about the tech.”

Sofia L. · Early access reviewer

★★★★★

“The reapply alerts alone are worth it. I burn less and I’m outside more than ever.”

Jenna K. · Early access reviewer

Built With Leading Skin and UV Expert

Dr. Richard Weller

World Renowned UV Specialist & Dermatologist

Chief Medical Officer

Frequently asked questions.

Is there a subscription or monthly fee?

No. Your Gem comes with the full The90 app and every core feature, with no monthly fee to read your own light. You buy the sensor once.

What does The Gem actually measure?

It reads the UVA and UVB reaching your skin, separately and in real time, then turns the day into a single Sun Score from 0 to 100. Along the way it tracks the light you want, like your morning circadian light and your estimated vitamin D, and the exposure you want to manage, like the UVA that ages your skin.

Do I have to wear it as a necklace?

It comes as a jewelry-grade pendant on a matching gold or silver chain, so you can wear it out of the box. The Gem is also a removable core, so it can move into new ways to wear it as they launch, including a hat clip and bag tag on the way.

How is this different from the UV Index or my weather app?

The UV Index gives one number for a whole city and says the same thing to everyone. The Gem measures the light actually hitting your skin, separates the aging rays from the higher-energy ones, and reads it against your personal skin profile in real time. It is the difference between a forecast and your actual day

Can I wear it in the water?

Rain, sweat, and a quick rinse are all fine. The Gem is water resistant to 1 meter for 30 minutes, so leave it off for the pool, the shower, hot tubs, and saunas.

What if it is not for me?

Try it for 30 days. If it is not right, send it back for a full refund, and every Gem is covered by a 1-year warranty. Free shipping, dispatched from California within 1 to 2 business days, currently within the US.

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2026

Own your light