What2KnowGet the appA straight answer for everyone in your home
Scan anything.
Know what matters.
Scan any food, drink, supplement, cosmetic, or pet product -- by barcode, or with an AI photo of the label, the wine bottle, even the plate. In seconds, What2Know reads what is actually inside, scores its diet quality, and tells you who in your home it is right for and who it is not -- flagging allergens, additives, and anything unsafe for your kids or your pets, with the sources cited right at each claim.
Free to download. No account needed.
So simple, the first scan just works
Three taps from the shelf
to a straight answer.
No sign-up, no learning curve. Point, capture, know — here is the whole flow.
Point
Barcode, ingredient label, or a plate of food -- three ways to scan.
Capture
It locks on in a blink. Tap once.
Know
A Diet Quality score and a plain answer for everyone in your home.
The report, redesigned with real families
Everything you need on one screen.
Every detail one tap away.
A scan opens as a compact summary -- your household verdict and Diet Quality score first, never buried. Tap Nutrition, Additives, Ingredient hazards, or Better choices to open just that section as its own screen. No more endless scrolling.
Built for the whole household
Everyone in your home,
checked at once.
One scan, a clear answer for every person and every pet. What2Know flags allergens and additives, and the things a label never spells out -- like a drink that is fine for the grown-ups but not the kids, or an ingredient that is toxic to your dog.
Try it in the app
All from one scan
More than a score.
People and pets
Every profile gets a clear yes, no, or caution -- the people you love and the dog at their feet.
Age-aware safety
Alcohol flagged for minors, baby- and toddler-stage rules, and foods toxic to pets -- caught automatically, no rule to set up.
Diet Quality score
One honest number out of 100, built from nutrition, processing, and additives -- with every source cited.
Additives report
Every additive itemised and tiered against published watch-lists -- what it is, what it does, in plain words.
Hazard screen
Ingredients checked against carcinogen and additive watch-lists, in plain language.
Better choices
When something is flagged, cleaner and better-rated alternatives that fit your home.
Basket Report
Score a whole shopping trip at once -- quality per dollar, conflicts for your household, and the best swaps.
Family Shelf
Everything you save is re-checked against your household as it changes over time.
Free to start
Barcode scans are always free and unlimited, and you need no account to try it.
Better choices, built in
Flagged something?
Trade up with confidence.
When something is not right for your home, What2Know surfaces cleaner, better-rated alternatives that fit, so you can swap with confidence. In the Greater Toronto Area, local grocery deals are scored for your household today -- and wherever you shop, every price you capture builds your own on-device price history, with alerts when a watched price drops.
Get the appBetter-rated for your home · deals live in the Greater Toronto Area
Questions, answered
Frequently asked.
Is What2Know free?
Yes. The app is free to download, barcode scanning is free and unlimited, and you need no account to try it. AI photo scans (ingredient labels, wine labels, meals) include a free monthly allowance; an optional Premium subscription unlocks unlimited AI scans, unlimited household profiles, and the full toolkit.
Does What2Know work for pets?
Yes. Add your dog or cat as a household profile and every scan is checked for them too -- ingredients like chocolate, onion, garlic, xylitol, and alcohol are flagged using published animal-safety sources such as ASPCA Animal Poison Control. Detection only, not a safety guarantee: always check the physical label.
What can I scan?
Barcodes on food, drinks, supplements, cosmetics, and pet products -- plus AI photo scans of ingredient labels, wine labels, and even a plate of food for an honest calorie range.
How does What2Know decide its verdicts?
Deterministic checks against published authorities -- FDA major food allergens, ASPCA animal-safety lists, Nutri-Score, the NOVA processing classification, and carcinogen and additive watch-lists -- with the sources cited right at each claim. What2Know is an informational tool, not a medical device, and never replaces advice from your doctor or veterinarian.
What happens to my scan photos?
Photos are used only to generate your result and are never stored by the app or used to train AI. Scanning also never reads your location -- the deals region is a setting you choose.
Where can I get What2Know?
What2Know is available on the Apple App Store for iPhone and on Google Play for Android.
Know what matters.
Free to download. Your first scans are on us -- no account needed.