- Which ingredient scanner app is the most accurate?
- No scanner reads a concentration off a label, because the label does not carry one above the 1% line. The meaningful difference is what each app does with that limitation. Yuka and Think Dirty score by ingredient risk category regardless of dose. EWG Skin Deep scores hazard - what a substance can do at some dose in some context. Luminelle scores regulatory status for the specific kind of product: a ban counts fully, a concentration limit the label cannot prove counts less, and a restriction that provably does not apply is shown but scores nothing.
- Why do these apps flag ingredients that dermatologists say are safe?
- Because most of them score on the presence of a regulated ingredient rather than on what the regulation says. The EU permits hundreds of ingredients below a stated concentration; a scanner that treats "appears in Annex III" as a problem will flag a compliant, well-formulated product. When Luminelle measured its own earlier presence-based model, 87% of all deducted points sat on entries the EU explicitly permits. Separating those out moved the mean score across the catalogue from 71 to 85 without removing a single genuine ban.
- Is there a free ingredient scanner?
- Yes, several. EWG Skin Deep is free and non-profit. Yuka and Think Dirty are free to scan with paid tiers. Luminelle gives unlimited barcode scans, five photo scans a day, a daily skin selfie and cycle tracking free; Pro adds unlimited photo scans, Patterns, Shelf Check and Ask Luminelle.
- Which app scans both food and cosmetics?
- Yuka and Luminelle both do, but not in the same way. Yuka scores both against its own risk model. Luminelle scores cosmetics against regulatory lists and treats food as calories, macros, Nutri-Score and NOVA - it does not apply cosmetic ingredient flags to food, because the regulatory lists behind those flags are about what you put on skin.
- Which scanner also tracks a menstrual cycle?
- Of the scanners here, only Luminelle. It records the cycle phase you were in on every product scan, meal and skin selfie, so a pattern between a product and a breakout can be told apart from the one that arrives on the same week every month. Dedicated cycle apps track the cycle better; none of them read an ingredient list.
