What2Know
Ingredient & allergen scanner
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
What2Know reads the label so you don't have to. Scan any product and get a clear, plain-English read on what's inside, for everyone in your home.
NO BARCODE? NO PROBLEM.
Scan a barcode for an instant, unlimited, always-free lookup. No barcode, like wine, local, specialty or cosmetics? Tap "Scan the label" and What2Know reads the packaging straight from a photo.
SCAN ANYTHING
Food, supplements, cosmetics, pet products, and wine. One app for the whole shelf.
BUILT FOR YOUR HOUSEHOLD
Set up a profile for each person and pet with their allergies, diet, and ingredients to avoid. Every scan tells you who it suits, and who should skip it. Save products to your Family Shelf.
INGREDIENT & HAZARD SCREENING
We check the ingredient list against published watch lists from public health authorities and flag additives and ingredients of concern.
BETTER CHOICES
When something doesn't fit, see cleaner alternatives in the same category, right in the app.
What2Know is an informational tool, not a medical device. It does not diagnose, treat, or prevent any condition. Allergen and hazard results reflect detection in the text we were able to read, not a guarantee of safety. Always read the physical product label and consult a qualified professional for medical or dietary decisions.
FREE VS. PREMIUM
Barcode scanning is free. What2Know Premium is an auto-renewing subscription ($4.99/month or $19.99/year) that unlocks unlimited AI "Scan the label" photo reads, unlimited household profiles, and product alerts. Payment is charged to your Apple ID at purchase. Your subscription renews automatically unless cancelled at least 24 hours before the end of the period, and you can manage or cancel anytime in your App Store account settings.
Privacy Policy: https://what2know.app/privacy
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
What's new:
- Additives report: every additive in a product, named with its function and a risk level you can tap through to the published source.
- Easier-to-read text throughout, plus a larger, clearer Diet Quality dial.
- A more polished scanning screen.
Informational only, not medical advice -- always read the physical label.
The developer, CHASM AI Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CHASM AI Inc.
- Size
- 70.5 MB
- Category
- Food & Drink
- Compatibility
Requires iOS 15.5 or later.
- iPhone
Requires iOS 15.5 or later. - iPod touch
Requires iOS 15.5 or later. - Mac
Requires macOS 12.4 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Alcohol, Tobacco, Drug Use or References
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- What2Know Premium Annual $19.99
- What2Know Premium Monthly $4.99
- Copyright
- © 2026 CHASM AI Inc.
