Allergy and ingredient scanner apps compared
In short: Scanner apps fall into four groups: barcode scorers (such as Yuka), diet and allergy filters (such as Fig), cosmetic ingredient apps (such as INCI Beauty and Think Dirty) and label readers (such as IngrediLens). Each answers a different question, and none replaces reading the label. For allergies, choose an app that checks your own allergens, shows "may contain" separately and says when it is unsure.
There are dozens of apps that scan food or cosmetics, and they are not trying to do the same thing. Some score how healthy a product is, some filter by diet, some focus on skincare chemistry, and some read the label itself. Comparing them by category is fairer and more useful than a single ranking. The app facts below come from each app's official listing or website, checked in October 2026; features change, so confirm in the app.
The four main categories
1. Barcode database scorers
You scan a barcode and the app shows a score or grade from its database.
- Yuka describes itself as scanning barcodes of food and personal care products and rating their health impact. Food is scored on nutritional quality, additives and organic status; it suggests better-rated alternatives and states that it has no in-app advertising.
- Open Food Facts is a non-profit, volunteer-built open database of food products with ingredients, allergens and nutrition facts. Its data is published as open data and used by many other apps.
2. Diet and allergy filter apps
You set the diets or allergies you follow and the app tells you whether a scanned product fits.
- Fig says it supports a wide range of dietary restrictions and allergies (its listing mentions low FODMAP, gluten-free, vegan, low histamine and alpha-gal among many options) and lets you scan barcodes to see if a product matches your needs. Its website lists products from US stores.
3. Cosmetic ingredient apps
These focus on INCI ingredient lists in skincare, make-up and hair products.
- INCI Beauty scans cosmetic barcodes, rates products out of 20 and identifies ingredients such as allergens, endocrine disruptors, silicones and parabens. It is a French app.
- Think Dirty scans skincare, hair care and cosmetic products and rates them on their ingredient content.
4. Label-reading (OCR) apps
These read the printed ingredient list with the camera, so they do not depend on the product being in a database. IngrediLens is in this category, with optional barcode lookup.
What each category does well, and its limits
| Category | Does well | Limits to keep in mind |
|---|---|---|
| Barcode scorers | Fast; one clear score; healthier alternatives | A score is not an allergen check; product must be in the database and up to date |
| Diet and allergy filters | Personal filters; good for finding products you can eat | Usually barcode-based, so the same database limits apply; coverage varies by country |
| Cosmetic ingredient apps | Detailed INCI knowledge; flags ingredient families | Usually cosmetics only; ratings reflect each app's own method |
| Label readers (OCR) | Work on any printed list, including local and imported products | Need a sharp photo; curved, glossy or tiny print can be misread; limited to the label languages they read |
No category is "the safest". The best choice depends on your question, your country and who you shop for.
How to choose: a checklist
- What is your question? Health score, diet fit, allergen check or skincare ingredients?
- Your allergens. Can you set exactly what you avoid, including custom items and other names?
- "May contain". Are precautionary statements shown separately and clearly? See what "may contain" means.
- Uncertainty. Does the app say when it could not find a product or read part of a label, and show which words matched?
- Your country and languages. Is your supermarket's range covered, and can it read labels in the languages you buy?
- Family. Can you keep several profiles?
- Cosmetics. Does it read INCI lists if you need that?
- Privacy. Account required? Health data stored on your device or on servers? Ads?
- Offline. Does it work with poor signal in the shop?
- Test it. Scan products you know well before relying on it.
For a longer, step-by-step version, see how to choose an allergen scanner app.
Using more than one app
Many people combine categories, for example a scorer for general shopping and an allergen checker for the family's allergies. That works well, as long as you remember that a good score never means "free from" anything, and that the pack in your hand is the final reference.
How IngrediLens helps
IngrediLens reads food and cosmetic ingredient lists with your iPhone camera, from a photo or typed text, and can also look up a barcode in Open Food Facts or Open Beauty Facts. It highlights your chosen allergens and their other names, and shows "may contain" statements separately. It reads labels in six languages and keeps your filters on your device, with no account. The free tier includes 2 filters; Premium adds unlimited filters, family profiles and more. It does not score products, so it pairs well with a scorer if you want both. It can miss things: always read the pack and follow your allergist's advice.
Check labels with IngrediLens
Point your iPhone camera at an ingredient list and IngrediLens highlights the allergens you chose and “may contain” statements. Free to start, no account, and your data stays on your device.
Download on the App StoreFrequently asked questions
Which type of app is best for a severe food allergy?
One that checks your own allergens, shows "may contain" statements and tells you when it could not read or find something. No app replaces reading the label or your allergist's advice.
Why does the same product give different results in different apps?
Apps use different databases, different update times and different rules. A barcode entry may describe an older recipe or another country's version of the product.
Do I need a separate app for cosmetics?
Cosmetic ingredient lists use INCI names, which many food apps do not cover. Choose an app that reads cosmetics if you react to skincare or hair products.
Is a crowd-sourced database reliable?
Open databases such as Open Food Facts are valuable and transparent, but entries are added by volunteers and may be incomplete or out of date. Compare the entry with the pack.
