What You Should Know
- Preventative skin health wearable pioneer The90 has formally launched out of stealth with The90™ Gem, a high-end smart jewelry pendant and companion app designed to track personal UV exposure.
- The device targets a massive market gap in healthy skin aging: up to 90% of visible skin damage, wrinkles, and fine lines are caused by cumulative, everyday ultraviolet light exposure rather than chronological aging.
- Unlike generic, location-based smartphone weather apps, the wearable utilizes live built-in sensors to capture the actual UVA (aging/window-penetrating) and UVB (burning) rays hitting the user’s skin.
- The company was founded by CEO Stacy Salvi, a prominent health-tech innovator who spent over a decade leading Google’s $2.1 billion acquisition of Fitbit and recently engineered award-winning smart rings for women.
- Available for $299, the launch features high-profile backing from Lauryn Bosstick, founder of The Skinny Confidential, alongside tech and apparel entrepreneurs from Life360, Blenders Eyewear, and Cuts Clothing.
The modern skincare and aesthetic medicine markets are operating within a high-stakes consumer paradox. Every year, millions of women invest billions of dollars into high-performance clinical treatments, multi-step antioxidant routines, medical-grade topicals, and specialized sunscreens designed to protect skin longevity. Yet, despite this massive expenditure, the baseline method for tracking the primary threat to skin health remains completely unchanged.
Consumers still rely on the generic UV Index pre-installed on their smartphones—a broad, macro-level regional estimate calculated by zip code that remains entirely blind to an individual’s immediate physical environment. A phone tucked inside a purse cannot differentiate between a shaded office cubicle, a long commute behind a glass windshield, or a highly reflective walk down a city street.
Because ultraviolet radiation is completely invisible, individuals routinely accumulate significant, unmeasured UV exposure during brief, ordinary moments throughout the day. Dermatological research confirms that up to 90% of all visible skin aging—including premature wrinkles, deep fine lines, loss of elasticity, and hyperpigmentation sun spots—is directly linked to this cumulative everyday sun exposure, not chronological aging.
By treating sun protection as a static, single-application morning ritual, consumers inadvertently leave their skin highly vulnerable to un-tracked environmental stress. For the wellness and preventative health optimization sectors, closing this awareness gap requires moving past high-level geographic estimates to deploy a continuous, hyper-localized sensor layer capable of translating real-time environmental exposure into customized, actionable guidance.
To address this hidden driver of skin aging and establish an auditable system of personal wellness data, preventative health technology pioneer The90 has launched its flagship sun intelligence system, centered around a modular smart jewelry wearable called The90™ Gem.
Transforming Invisible Light Into Hyper-Localized Data Loops
The core technology driving The90 Gem is an on-body personal environmental intelligence system. Rather than duplicating the generic data loops of standard weather feeds, the pendant utilizes high-precision optical sensors to continuously sample the exact ambient UVA and UVB light hitting the user’s body.
This sensory precision is a critical health differentiator: UVA rays, which maintain a consistent presence from sunrise to sunset and penetrate directly through standard residential and automotive window glass, are the primary drivers of deep cellular degradation and long-term skin aging. UVB rays, by contrast, possess shorter wavelengths that spark surface-level inflammation and traditional sunburns.
By streaming this real-time environmental data directly into the companion app via encrypted wireless protocols, the platform cross-references live environmental metrics with a customized user skin profile that tracks Fitzpatrick skin typing, baseline sun sensitivity, and real-time protective behaviors.
This data integration allows the app to move past static charts to deliver highly contextualized sun intelligence features:
- Sunscreen Decay Modeling: Automatically calculates the degradation curve of applied topical SPF based on actual cumulative UV load rather than a simple countdown timer.
- Smart Reapplication Prompts: Triggers targeted, haptic, and mobile push notifications exactly when a user’s unique UV threshold is crossed, removing the guesswork from product reapplication.
- Optimal Synthesis Windows: Dynamically maps out specific, safe sunlight exposure windows, empowering women to strategically capture the systemic health benefits of natural light while insulating their skin from cellular damage.
“Women are already investing in SPF, treatments, tools, and routines to protect their skin, but when it comes to sun exposure, most of us are still guessing,” observed entrepreneur, podcast host, and company advisor Lauryn Bosstick. “The UV Index on your phone doesn’t know your skin, your sunscreen, or the small moments of exposure that happen throughout the day. The90 gives women the missing data to make smarter decisions and stay ahead of skin aging before it starts.”
