The90 Gem

The90 Gem

Real-time UV tracker

9 ratings
7 reviews
Free

Details

Released
June 9, 2026
Updated
October 10, 2026

Features

The90 Gem screenshot #1 for iPhone
The90 Gem screenshot #2 for iPhone
The90 Gem screenshot #3 for iPhone
The90 Gem screenshot #4 for iPhone
The90 Gem screenshot #5 for iPhone
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About

This jewelry-inspired sensor tracks your skin's real-time UV exposure. It helps you protect against aging and harness the sun's health benefits.

✓Real-time UV tracking
✓Skin exposure monitoring
✓Aging protection
✓Sun health benefits
✓Jewelry-inspired design
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What's New in The90 Gem

1.2.0

October 10, 2026

• Home has been rebuilt around your live Personal UVI, with daily history so you can look back through past days and evening skies. • Sun Score has been introduced, shows the parts of your day: morning light, Vitamin D, Nitric Oxide, burn, UVA, and leftover sun. • New Insights for UVA and UVB, plus Circadian Light, Vitamin D, and Nitric Oxide pages, each with charts and resources. • A Weekly Report sums up the week. • Access to your previous day histories • Interactive Sun Exposure chart • Sun protection follows your clothing and sunscreen, and you can log an application for earlier in the day. • Dark Mode, larger text, bug fixes and other UI/UX improvements

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User reviews

Good concept

Good concept, flawed execution. To begin the inability to retroactively add SPF is beyond frustrating - life gets busy, it should be an easy thing to go back and add at the end of your day.

Notifications when you’re reaching thresholds would also be extremely helpful.

Response from developer

Dear Customer, The functionality to apply SPF and clothing retroactively is scheduled for the next big release (ETA in September). Notifications for thresholds are already in place, however, if you are on iOS 26.5.2, they won't be coming until you hard restart your phone. Hope it helps. Sincerely yours, The90 Customer Support Team

Love this product

It works well

Awesome!

Very informative to see real time accumulation of UVA (aging) UVB (burn) and Vitamin D exposure daily versus guessing on a UV index forecast. Love it!

Great app maybe some room to grow

I really like this app! It has been a great tool for helping me monitor my UV exposure and stay more aware of my time in the sun.

One feature I'd love to see in a future update is the ability to indicate when I'm wearing UV-protective clothing or using an umbrella, so the app could factor that into my overall UV exposure.

Overall, I love it and can't wait to see how the app continues to improve!
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Response from developer

Dear User, thanks a lot for your feedback and suggestions. We have included UV-protective clothing to our product development pipeline and this will be released in one of the future versions of the app. Sincerely yours, The90 Customer Support Team.

Best invention!

My favorite feature is the vitamin D level tracking- I love that it tracks how much I am getting daily ensuring I get enough every day. Also, the aging score is so motivating — being able to own how long and when to get out of the sun is a game changer. Simple, clear, and it’s changed how I think about a daily habit I used to ignore completely. Highly recommend.
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FAQ

What is The90 Gem?

The90 Gem is a jewelry-inspired UV sensor that tracks your skin's real-time UV exposure. It helps you protect your skin from aging and utilize the sun's health benefits.

How accurate is The90 Gem's UV tracking?

The app tracks what your skin actually experiences, providing real-time data on UV exposure. Specific accuracy metrics are not detailed in the provided information.

What are the health benefits of using The90 Gem?

By monitoring UV exposure, The90 Gem helps users harness the health benefits of the sun while protecting their skin from potential damage and aging.

Does The90 Gem have ads?

No, The90 Gem does not contain advertisements.

What devices is The90 Gem compatible with?

The90 Gem is compatible with iPhones and iPods.

How often is The90 Gem updated?

The latest version, 1.1.2, was released on July 13, 2026, indicating regular updates. The app was initially released on June 9, 2026.

What is the age rating for The90 Gem?

The90 Gem has an age rating of 4+, making it suitable for a wide range of users.

What is the user sentiment for The90 Gem?

The app has a rating of 4.3 stars from 7 ratings, suggesting generally positive user feedback.