Settings

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Sync your scans and profiles across devices. Optional -- scanning works without an account.

AI photo analysis

When on, photos are sent to Anthropic (Claude) only to generate your result and are never used to train AI. Anthropic automatically deletes them within 30 days.

Scan sounds

Play a soft sound when a barcode is detected and when a verdict is ready. Haptics always follow your phone's settings.

Our independence pledge

No ads, no outside influence, and your data stays yours.

How the Diet Quality Index works

The public standards and authorities behind our 0 to 100 nutrition score -- Nutri-Score, NOVA, IARC, EFSA and more.

Help us build What2Know

Send your best idea straight to the team -- real customer suggestions decide what we build next.

Upgrade to Premium

Unlimited AI scans, unlimited profiles, and in-app substitutes for cleaner swaps. Barcode scans are always free.

View plans

See What2Know Premium and everything it unlocks.

Privacy Policy

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Disclaimers

What2Know is not a medical device and does not diagnose, treat, cure, or prevent any condition. Not medical, dietary, or veterinary advice.

Delete account and data

Permanently removes your account, scans, and profiles. You can also request deletion at what2know.app/delete-account.