VC-Backed Founder
PhD Founder
Female Founder
Exited FounderAbout
The90 builds the Gem, a passive smart jewelry pendant that measures on-body UVA and UVB exposure and morning daylight to deliver real-time sun safety, circadian, and recovery guidance. The company aims to become the physical AI layer for human light and health. It is building a longitudinal light telemetry dataset to license to pharma, clinical trials, and dermocosmetics companies.
Traction & Metrics
Financial
$75
CAC
Fundraising
$2.8M
Previous Round
Products
The90 Gem
Passive smart jewelry pendant with dedicated UVA/UVB spectral sensing worn on the chest plane, paired with a photobiological AI app. It tracks real-time Minimal Erythema Dose, a unified Sun Score, morning circadian light, and Vitamin D and nitric oxide windows, with 7-day battery life in a water-resistant jewelry form factor. Anonymized telemetry also feeds B2B APIs for pharma trials and dermocosmetics.
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