Know what's really in it

Scan a barcode or the ingredients list itself, and get a straight answer about gluten - including the "may contain traces" warnings that other apps bury or skip.

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Free to use. No account. No ads.

The GlutenTrace start screen, Check a product, with buttons for scanning a barcode or an ingredients list
A GlutenTrace result screen showing a red Contains gluten verdict for LU Prince biscuits, naming ble as the gluten source found

What it does

Scan the ingredients list

Photograph the label and your phone reads it on the device. Works on any product, even one no database has heard of. Nothing leaves your phone to do it.

A GlutenTrace result with the amber "May contain traces" verdict for a Ritter Sport chocolate

Or scan the barcode

Looks the product up and gives you its name and brand. The database is missing the ingredient list for many products, so the app tells you how old its information is.

The GlutenTrace check-a-product screen with options to scan a barcode or an ingredients list

See which ingredient

The gluten source is marked in the list, so you can see why - in ten languages, including the German and Italian labels that turn up in European shops.

A GlutenTrace result screen showing a red Contains gluten verdict for LU Prince biscuits, naming blé as the gluten source found

Why we built it

We are a family with celiac disease close to us. The apps we tried told us a product was "safe" without telling us how they knew - and treated a voluntary "may contain traces" warning as if it meant something precise. It does not. So we built the app we wanted: one that shows its work, and says plainly when it does not know.

(Celiac disease is spelled "coeliac" outside the US - same condition.)

Read what "may contain traces" actually means

Free, always

  • Unlimited barcode and ingredient scans
  • The safety verdict, with the reasoning behind it
  • Which ingredient is the gluten source
  • A warning when the database information is over a year old
  • Photograph a missing product's ingredient list and send it in - the next person who scans it gets the answer
  • Your last 5 scans
  • Your own list of products, shareable with whoever does the shopping

What Pro adds

  • The full ingredient list, with the gluten marked
  • Product photo, whenever the database has one
  • The exact date the information was last updated
  • Unlimited scan history
  • All the articles from the family behind Renmel
  • Restaurant cards in six languages for travelling
  • Several named lists - sweets, snacks, dinners - so you can send just the one that is needed

Pro supports a family-run project. No ads, and we do not sell data.

A green GlutenTrace result "Labelled gluten-free" for Barilla Napoletana, with the option to see the full ingredient list in Pro

Where the data comes from

Product data comes from Open Food Facts, an open, community-maintained database, used under the Open Database License. Product photos are used under CC BY-SA. Ingredient lists change and databases lag behind - so the app tells you how old its information is, and says when it does not know instead of guessing.

openfoodfacts.org

Get GlutenTrace and scan your first product.

Download on the App Store