July 31, 2026

Allergen Scanner Apps and European Products

If you have installed a well-reviewed allergen scanner and found half your shopping comes back as “product not found”, the app is probably fine. The database behind it is the problem.

Coverage is a database property, not an app one

Almost every independent scanner reads from the same place: Open Food Facts, a crowd-sourced open database of packaged food. A handful of commercial apps license US-centric datasets instead, which is where the gap comes from.

Open Food Facts started in France and its coverage reflects that. French products are excellent. Germany, Spain, Italy, Belgium and the Netherlands are strong. Central and Eastern Europe — Croatia, Poland, Czechia — are thinner but improving quickly.

US-first commercial datasets are the reverse: dense on American national brands, sparse on Lidl own-brand yoghurt in Zagreb.

Own-brands are the hard case

Supermarket own-brands are the biggest coverage hole anywhere. They change recipes and packaging often, sell in one country, and get less crowd attention than national brands. If most of your basket is own-brand, expect a lower hit rate regardless of which app you pick.

That is worth knowing up front rather than discovering it as a series of failed scans.

What a good app does when it does not know

This matters more than raw coverage, because every scanner will miss things.

• It says so plainly. “Unknown” is a valid, useful answer.
• It does not imply safety from absence. No allergen data is not the same as no allergens.
• It does not charge you for the miss. If there is a scan limit, a failed lookup should not consume it.
• It lets you check the label yourself and move on quickly.

An app that quietly renders a clean-looking screen for a product it knows nothing about is worse than one that returns nothing.

You can improve coverage yourself

Open Food Facts is editable by anyone. Adding a missing product takes a couple of minutes — barcode, photo of the ingredient list, done — and every other app reading that database benefits. It is the rare case where fixing your own annoyance fixes it for strangers too.

Where Allervibe fits

Allervibe is built in Europe and reads Open Food Facts, so its coverage follows the pattern above: strong across Western Europe, patchier in the east and improving. It covers 13 allergens, works without an account, and keeps your profile on the device.

When a product is unknown, it says unknown, and the lookup does not cost you a scan.

For the meals that have no barcode

Restaurants are where scanners run out of road entirely. That is what a printed allergy card is for — free, 14 languages, wallet-sized.