The90 Gem App

Content rating
Everyone
10+
Downloads
Content rating
Everyone
Learn more
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About this app

The jewelry-inspired UV pendant that tracks what your skin actually experiences, so you can protect how you age while harnessing the health benefits of the sun.
The jewelry-inspired UV pendant
Updated on
Oct 20, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Location and Personal info
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Minor bug fixes and improvements