Support

Open the Scan tab, allow camera access, and point your camera at the product barcode or label. You will get a plain-language result in a few seconds.

No. What2Know is an informational tool, not a medical device, and it does not provide medical recommendations -- it can in no way replace a consultation with a health professional such as a dietician, a doctor, or a veterinarian for pets. Allergen results show what we detected in the text we could read -- not a guarantee a product is safe. Always check the physical label, and always check with your doctor before making medical or dietary decisions.

Subscriptions are billed by the app store. Manage or cancel in your Apple App Store or Google Play account settings (Subscriptions). Cancelling stops future renewals; current access runs until the period ends.

In the app, go to Settings then Delete account, which permanently removes your account, scans, and profiles. You can also email privacy@what2know.app.

Use the "report this result" control on any result screen, or email us. Reports help us improve, and you should always rely on the physical label over an app result.

Food companies update their recipes all the time. Our numbers come from product databases -- snapshots of a past label -- so once in a while, the package in your hand is newer than our copy. When that happens, trust your package: it is the regulated source of truth. Then tap "Rescan the label" on the report's Nutrition card and we will rebuild the report from the box you are holding.

Your photo is sent to Anthropic (Claude) only to generate your result and is never used to train AI. Anthropic automatically deletes it (typically within 30 days). See our Privacy Policy.