Sunlight, finally
understood.
Solara runs quietly in the background — tracking your sun exposure, estimating Vitamin D synthesis live, and delivering every insight linked to real science.
Zero manual logging. Solara detects your sunlight exposure passively throughout the day using your device sensors and location data.
We calculate your estimated Vitamin D production in IU — factoring in UV index, skin type, exposure duration, and cloud coverage, updated continuously.
Every progress update, milestone, and recommendation is linked directly to the peer-reviewed study that supports it. No guesswork.
How It Works
Your body,
in the light.
No wearable. No manual check-in. Solara works quietly while you live your life — turning sunlight data into meaningful health insights.
Solara uses your device's light sensor, GPS, and real-time UV index to detect when you're in sunlight — automatically, all day long.
No input neededUsing established photobiological models, we estimate your Vitamin D synthesis in IU, personalised to your skin tone, latitude, and the season.
Personalised to youAs your exposure builds, Solara delivers contextual updates explaining what's happening inside your body — with each claim linked to the study that proves it.
Research-linkedDaily Tracking
Your exposure,
at a glance.
A live dashboard shows your sun time, lux exposure, estimated IU synthesised, UV index and your personal daily goal — all calculated without you lifting a finger.
Real-time lux & IU counter — watch your Vitamin D build throughout the day.
UV index awareness — Solara alerts you before UV becomes harmful for your skin type.
First-light timestamp — the exact moment you stepped into morning sun, the moment that matters most for your circadian rhythm.
Deep Insights
Connected to
the science.
Solara doesn't just give you numbers. Every milestone is an opportunity to learn how light affects your biology.
Research-linked updates — tap any update to see the peer-reviewed study behind it.
Circadian alignment — understand how morning light affects your sleep and cortisol levels.
Mitochondrial health — track how infrared and UV light support cellular energy.
"Sunlight is a vital biological signal, not just a source of Vitamin D. Understanding its timing and intensity is key to human health."
— Photobiology Research Journal
Join the community
Sunlight, understood.
Solara is currently in private beta. Join the list to be notified when we open access.
Passive sunshine tracking No wearables