Sunscreen effectiveness
How sunscreens actually perform in real life — not in a controlled lab.
What it is
Lab SPF ratings assume a thick, evenly-applied, regularly-reapplied coat that almost no one uses in daily life. Cureledger measures what really happens: which products people choose, how they apply them, the UV they meet, and how their skin responds over weeks and months.
How we build it
Where the data comes from.
A hands-on study app
Participants test different sunscreens, photograph their skin over time, and submit structured reports through our study app — turning everyday use into comparable, longitudinal data.
Structured, comparable reports
Each report captures the product and SPF, how and how often it was applied, UV exposure, and visible skin response — so results can be compared across products and people.
What's in the data
The fields you can work with.
- Product & SPF
- The specific sunscreen used, its SPF, and formulation.
- Application habits
- How much, how often, and how consistently it was applied.
- UV exposure
- Sun exposure and conditions during each reporting period.
- Skin response
- Photographed skin changes and self-reported response over time.
Who it's for
Built for consumer skincare brands and dermatology researchers — to see real-world efficacy, application behavior, and head-to-head product comparisons that lab SPF numbers miss.
Consumer skincare brands · dermatology research
Living with this condition?
Contribute your data.
Each condition has its own app for the people who live it. The Sunscreen effectiveness app is in development — when it launches you'll be able to contribute de-identified data on your own terms and share in the value it creates.
We're building the Sunscreen effectiveness app now. Check back soon — or ask us about contributing early.
Researcher or partner?
Tell us what you need — we'll be in touch about access, terms, and timing.