Questions, answered.
If you don’t see your question, email hello@the90.com. A real person responds, usually within a day.
Pricing & ordering
How much does The Gem cost?
Is there a subscription?
When will my order ship?
Can I pay over time?
About the product
Is The Gem a replacement for sunscreen?
How accurate is it?
Do I have to wear it on a necklace?
Is it splash-proof?
App
How long does the battery last?
Does it work on all skin tones?
Which phones work with The Gem?
What happens to my data?
Do I need the app for the device to work?
Warranty & returns
What’s the return policy?
What if my Gem stops working?
Can I exchange the chain or finish?
Skin & sun
Is this medical advice?
Does UV really cause that much aging?
If I avoid the sun completely, am I safe?
FSA / HSA
Is The Gem FSA/HSA eligible?
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.
By subscribing you acknowledge our privacy policy and consent to receive updates from our company.
Stay in Touch
About
Legal
©
The90™. All Rights Reserved