Democratizing beauty and skincare knowledge through free, interactive, and science-backed tools.
Larewa was founded with a single, clear objective: to make personalized, expert-level skincare guidance accessible to everyone. The beauty industry is notoriously overwhelming. With thousands of products, conflicting advice from social media, and expensive professional consultations, finding a routine that actually works for your unique skin barrier can feel like an expensive game of trial and error.
That's why we built a library of free, interactive tools powered by dermatology research, cosmetic science, and beauty expertise. From discovering your exact skin type to analyzing SPF needs or hair porosity, Larewa acts as your personal beauty science companion, providing objective recommendations in seconds.
Larewa started in 2024 as a small project by a team of software developers and cosmetic chemists. We were frustrated by how much skincare information was either gatekept behind subscription paywalls or heavily biased by brands trying to sell specific products.
We asked ourselves: Why isn't there a place where anyone can calculate their sunscreen reapplication times, analyze ingredient decks, or build a routine without being pushed to buy a $100 serum?
What began as a simple SPF calculator quickly grew into a comprehensive platform with over 30 interactive calculators, analyzers, and planners. Today, Larewa serves thousands of monthly visitors, helping them make smarter, healthier decisions for their skin, hair, and wallet.
Skincare is biology, not magic. Every tool on Larewa is designed around established dermatological frameworks and peer-reviewed research. We do not use speculative trends; instead, our calculators rely on:
We structure our routines around clinically validated principles: starting with the Fitzpatrick Skin Phototype scale for UV assessments and the Baumann Skin Type system for oil and sensitivity analysis.
Our ingredient guides are based on databases published by the Cosmetic Ingredient Review (CIR) and the European Commission’s scientific committees, focusing on concentration safety and proven efficacy.
Every tool is built on verified dermatology principles and scientific guidelines. We have no brand sponsors, meaning our advice is entirely objective.
All 30+ tools are completely free. No credit cards, no account walls, and no paywalls. Everyone deserves a healthy skin barrier.
Our algorithms work across all skin types, Fitzpatrick phototypes, ethnicities, and genders. Beauty is diverse, and so is our engineering.
We do not collect or save your skin data, answers, or personal profiles. Everything is computed instantly in your browser session.
The content and tools on Larewa are for informational and educational purposes only. They do not constitute medical, diagnostic, or dermatological advice, and are not a substitute for professional medical care. Always consult with a licensed dermatologist or healthcare professional before beginning any new treatment or skincare regimen, especially if you have chronic skin issues.
Have feedback, found a bug in one of our calculators, or want to collaborate? We would love to hear from you.
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Discover 30+ free skincare and beauty tools designed to help you look and feel your best — all backed by science.