The90 Gem

The90, Inc. Health & Fitness iPhoneiPadiPod touch

The90 Gem is a free Health & Fitness app for iPhone and iPad by The90, Inc. Rated 4.3/5 from 9 ratings. Requires iOS 15.0. Updated October 10, 2026.

Rating: 4.3; 9 ratings
Price: Free; on the App Store
Size: 112 MB; Age 4+
Updated: Oct 10; 2026 · v1.2.0

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Screenshots

About The90 Gem

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.

Ratings & reviews

4.3

9 ratings

5 ★ 67% 4 ★ 22% 3 ★ 0% 2 ★ 0% 1 ★ 11%

What’s new

Version 1.2.0 · Updated 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

App privacy

The developer, The90, Inc., reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

Contact Info: Name

Used for: Developer’s Advertising or Marketing, Product Personalization

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

Contact Info: Email Address
Diagnostics: Crash Data, Performance Data
Health & Fitness: Health, Fitness
Location: Precise Location

Used for: Developer’s Advertising or Marketing, Analytics, Product Personalization, App Functionality

App details

The90 Gem is a free Health & Fitness app for iPhone, iPad and iPod touch, developed by The90, Inc. It is rated 4.3 out of 5 from 9 ratings on the App Store, requires iOS 15.0 or later and is 112 MB to download. It was first released on June 9, 2026 and last updated on October 10, 2026.

Category: Health & Fitness
Rating: 4.3 / 5 (9 ratings)
Price: Free
Version: 1.2.0
Size: 112 MB
Requires: iOS 15.0 or later
Compatibility: iPhone, iPad, iPod touch
Languages: English
Age rating: 4+
Released: June 9, 2026
Last updated: October 10, 2026
Developer: The90, Inc.

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Alternatives to The90 Gem

Looking for apps like The90 Gem? Here are 6 similar apps on the App Store. The highest rated is MyCircadianApp (4.9/5), and all 6 are free to download.

The90 Gem vs. alternatives
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The90 Gem	4.3 / 5 (9 ratings)	Free	October 10, 2026
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MyCircadianApp	4.9 / 5 (265)	Free	Oct 1, 2026	Compare

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