Yuka vs Think Dirty: Food Scanning vs Cosmetics-Only Scanning

The short answer

Yuka scans food and cosmetics. Think Dirty scans cosmetics and personal care only. If your main question at the store is "what additives are in this cereal, yogurt or protein bar," Think Dirty will not help you, because it has no grocery database. If your main question is "what is in this face cream, shampoo or baby lotion," Think Dirty goes deeper on ingredient-by-ingredient explanations than Yuka does.

So the honest framing of Yuka vs Think Dirty is not "which app is better." It is a cosmetic scanner vs food scanner decision. One app tries to cover the whole cart, from pasta sauce to sunscreen. The other picks one aisle and studies it closely.

What each app actually scans

Yuka

Yuka is a barcode scanner covering packaged food, drinks and personal care products. Scan a box of crackers at Target and you get a 0 to 100 score, a color band from bad to excellent, a list of flagged additives, and suggested alternatives. Food scores are weighted roughly 60% nutritional quality (based on the Nutri-Score logic used in Europe), 30% additives, and 10% organic status.

Practical note for US shoppers: coverage is strongest for national brands and weakest on regional items, seasonal Trader Joe's products, and store-brand reformulations. If you want the full picture of gaps and workarounds, see our breakdown of whether Yuka works reliably in the US.

Think Dirty

Think Dirty is cosmetics-first: makeup, skincare, hair care, deodorant, sunscreen, baby wash, cleaning-adjacent personal care. It gives a 0 to 10 "Dirty Meter" score where 0 is clean and 10 is a product it considers high concern, plus sub-ratings for carcinogenicity, developmental and reproductive concerns, and allergy or immune concerns. Tap any ingredient and you get a plain-language explainer.

Scan a can of soup with Think Dirty and you will get nothing useful. That is not a bug. The app was never built for groceries.

Scoring methods compared

The difference matters at the shelf. Yuka can tell you that a "veggie" chip is mostly potato starch with high sodium and a questionable colorant. Think Dirty can tell you which of the 34 ingredients in your retinol serum drove the score. Neither app can do the other's job well.

Is Think Dirty accurate?

Reasonably, with caveats that apply to almost every hazard-rating app.

Think Dirty scores are hazard-based, not exposure-based. An ingredient can carry a concern flag in the scientific literature at doses far above what appears in a leave-on lotion. Toxicology depends on dose and route of exposure, which is why the same ingredient can be flagged in an app and still permitted by regulators. The FDA explains its own framework for cosmetic ingredient safety and labeling, and the EU keeps a much longer restricted-substances list under its cosmetics regulation. That transatlantic gap is real, and it is exactly what drives the "banned in Europe" videos so many US shoppers see.

Other accuracy limits worth knowing:

• Formulas change faster than databases. A product reformulated last quarter may still show the old ingredient list.
• Fragrance is often a single line item hiding dozens of components, so any score on a fragranced product is partly an estimate.
• Concentration is rarely published, so apps score the presence of an ingredient rather than how much is in the bottle.
• User-submitted entries can carry typos or incomplete lists.

Treat both apps as a triage tool that shortens your reading, not as a verdict.

Database coverage and US availability

Think Dirty app US shoppers get solid coverage of drugstore and mass-market beauty, Sephora and Ulta staples, and many indie clean-beauty brands. Gaps show up with newer launches, international products, and salon-exclusive hair care. The app is free on iOS and Android with in-app extras.

Yuka is available in the US on both platforms with a free tier that includes unlimited scans; a paid subscription (roughly $14 to $20 per year depending on promotion) unlocks offline mode, search without scanning, and custom preferences. Its US food database has grown substantially, but the nutrition engine still leans on European scoring logic, which sometimes clashes with US serving sizes and label conventions. Our comparisons of Yuka vs Trash Panda and Yuka vs EWG Healthy Living go deeper on how those scoring philosophies differ.

Where each app is strongest

Choose Yuka if your weekly pain is the grocery cart. You want to know whether the kids' yogurt has three sweeteners, whether the bread at Walmart is mostly dough conditioners, whether the "clean" protein bar is still ultra-processed. Yuka gives you one score at the shelf and a swap suggestion, which is fast enough to survive a real shopping trip with a toddler in the cart.

Choose Think Dirty if your bathroom cabinet is the bigger project. Rebuilding a skincare routine, checking a pregnancy-safe list, vetting sunscreen or baby products: the per-ingredient explainers do more teaching per scan than Yuka's shorter cosmetic cards.

Run both if you are doing a full household audit. They cost nothing to try, and the overlap is small.

Limitations to keep in mind

Neither app evaluates the things that often matter most nutritionally: total diet pattern, portion size, how often you eat a food, or how a product fits your household's needs. A single high score does not make a food a health food, and a low score does not make it dangerous.

Both apps also lean on published hazard lists rather than original testing. That is a reasonable approach, but it means a US product can score poorly simply because an ingredient sits on a European restricted list while remaining legal here. Useful context, not proof of harm. For food specifically, it helps to understand how the GRAS system works before assuming a flagged additive is unregulated.

Finally, watch the recommendation engines. When an app suggests alternatives, check whether the suggestion is genuinely better on the label or just better represented in the database.

Bottom line

Think Dirty vs Yuka comes down to scope. Think Dirty is a specialist: deeper cosmetic ingredient education, zero grocery coverage. Yuka is a generalist: good-enough cosmetic scanning plus a food engine that actually works in the aisles, with US database gaps you will occasionally hit. For the shopper whose core question is "what is really in my family's food," a food-capable scanner is the one that earns daily use, and a cosmetics-only app is the second install rather than the first. If you want that food-side reading made faster, with additive flags and ultra-processed warnings on the products in your cart, Osana is worth a scan on your next grocery run.

FAQ

Can Think Dirty scan food barcodes? No. It is built for cosmetics and personal care. Food barcodes will not return a score.

Does Yuka replace Think Dirty for beauty products? Partly. Yuka flags cosmetic ingredients and gives a score, but Think Dirty's per-ingredient explanations are more detailed if you want to learn why an ingredient was flagged.

Which app is better for pregnancy or baby products? Think Dirty, for personal care, because of its developmental and reproductive concern sub-scores. Always confirm with your clinician rather than relying on an app score.

Are the free versions enough? For most shoppers, yes. Both apps allow scanning for free; paid tiers mainly add offline access, search and preference filters.

Why do US and EU ratings differ so much on the same product? The two regions maintain different restricted-ingredient lists and approval processes, so an ingredient permitted in a US formula may be limited or banned in an EU one, and apps often cite the stricter list.