About CosmeSight

What it does

• Collects full ingredient lists of products sold in Korea, popular products in Japan, the US and China, and luxury brands, and scores them by concern: hydration, soothing and barrier, tone and dark spots, wrinkles and firmness, breakouts and texture.
• Shows a separate gentleness score and a sunscreen filter score.
• Photo search (in trial): take a photo of the front of a product in a store and CosmeSight finds it, even when the label is in Korean.
• No sign-up. Your skin settings and saved products stay on your device.

How scores are calculated

1. Evidence per ingredient: each ingredient gets a value from how consistently controlled human studies showed an effect (grade A, B or C) and how large the effect was. Test-tube, animal and device studies are not used to raise a grade.
2. Estimated concentration: using labeling rules (ingredients above 1% listed in descending order), declared amounts and typical water content by product type, CosmeSight estimates each ingredient's concentration and compares it with the level used in studies.
3. Combining into stars: the strongest ingredients for each concern are combined and converted to 1 to 5 stars in half-star steps. Five stars means a grade A, large-effect ingredient at its studied level. Rinse-off products count less because little stays on the skin.
4. Gentleness and sun protection: gentleness starts at 5 and subtracts allergy and irritation factors. The sunscreen score rates the filter combination. It is not a measured SPF or PA value.

Independence

• Scores and top picks come only from ingredient lists and ingredient research. Ads, partnerships and brand services do not affect scores or rankings.
• Ratings and review counts from retailers are not used in scores. They only order products that have the same ingredient score.
• CosmeSight does not sell scores, badges or awards.
• Correction requests from any brand follow the same rules, and every outcome (raised, unchanged or lowered) is published in the public log.

What the score is not

• It is not a measurement or guarantee of a product's results, and it may not be quoted in advertising or on packaging.
• It is not medical advice. If a skin concern persists, see a professional.
• CosmeSight does not use EWG grades or "ingredients to avoid" lists.

Data sources and updates

• Ingredient lists: public full-ingredient labels, with brand official stores as the first source. Each product page shows its source and check date.
• Research: publicly available abstracts and papers (PubMed and others), trial registry results, and Korean and international regulatory documents. Paywalled or access-restricted material is not used.
• Product and ingredient data are updated daily. Changes to the scoring rules are recorded in the app's change log.

Corrections and contact

• Brands can submit ingredient corrections, concentration data and finished-product test results on the submission page (Korean).
• Contact: contact@cosmesight.com
• Privacy policy (Korean)