# What2Know — Ingredient & allergen scanner

> Scans product labels for ingredients, allergens, and dietary suitability. (iPhone/iPad app by CHASM AI Inc..)

- Source: https://appshunter.io/ios/app/what2know/id6781062144 (this page in markdown: same URL + `.md`)
- Developer: [CHASM AI Inc.](https://appshunter.io/developer/6772385252)
- Category: Food & Drink, Health & Fitness
- Price: Free with in-app purchases
- Rating: 5.00/5 from 4 App Store ratings · 4 written reviews indexed
- Age rating: 12+
- Requires: iOS 15.5 · 68 MB
- Languages: American English
- Released: 2026-07-09
- Data updated: 2026-09-09
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/what2know/id6781062144/reviews.md

## What is What2Know?

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/

## Key features

- Barcode scanning
- AI-powered label scanning
- Household profiles with allergies
- Ingredient and hazard screening
- Product alerts
- Alternative product suggestions

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| What2Know Premium Monthly | $4.99 | per month |
| What2Know Premium Annual | $19.99 | per year |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/what2know/id6781062144/reviews.md

### 5/5 — Shrimp Scampi

*2026-07-24*

So I went to a local grocery store and was going to purchase frozen shrimp scampi.  So, I scanned the package with what 
2know and I learned that there were 39 ingredients mixed in with the shrimp.  I immediately placed the package back in the frozen section. Later that day. I went to a large box store and bought fresh shrimp that had no additives. So glad this tool is now available so that I can make better choices.

### 5/5 — Was Wishing for This Just a Few Days Ago

*2026-07-11*

My dog is allergic to some ingredients, and I was searching for another dog food that avoided those, in the grocery store. It was a hassle to pull down the bags and find the ingredients. 
Next time, I will use the What2Know app!

### 5/5 — How did I survive without this?

*2026-07-11*

This app is so helpful for knowing what food and consumable products are safe for my family and me. It’s easy to use and keeps your history. It lets you put in your family information, as well as your other people (dogs and cats).

### 5/5 — Superior to other scan apps

*2026-07-10*

With this app you can scan food, cosmetics, pet foods and more for “What2Know” about every consumable. You can enter your family and pet information so it knows each persons and each pets dietary preferences and restrictions. It’s other scan apps on steroids!

## Frequently asked questions about What2Know

### What2Know barcode scanning is free, but what does the Premium subscription offer?

What2Know Premium offers unlimited AI "Scan the label" photo reads, unlimited household profiles, and product alerts. It is an auto-renewing subscription priced at $4.99/month or $19.99/year.

### How do I cancel my What2Know Premium subscription?

You can manage or cancel your subscription anytime in your App Store account settings. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period.

### Does What2Know have ads?

No, What2Know does not contain advertisements. The app is free to use for barcode scanning, with optional premium features available via subscription.

### What devices does What2Know support?

What2Know is supported on iPhone and iPod devices. The latest version is 2.0.8, last updated on July 16, 2026.

### What is the age rating for What2Know?

What2Know has an age rating of 12+. This indicates the content is generally suitable for users aged 12 and older.

### How often is What2Know updated?

The app was last updated on July 16, 2026, indicating regular updates to improve functionality and features. The initial release date was July 9, 2026.

### Can What2Know scan wine and cosmetic labels?

Yes, What2Know can scan labels for food, supplements, cosmetics, pet products, and wine using its AI "Scan the label" feature, which is part of the Premium subscription.

### What kind of user sentiment does What2Know have?

Based on the provided data, What2Know has a very positive user sentiment, with a rating of 5.0 stars from 3 ratings.

## Version history (last 5 releases)

### 2.2.1 — 2026-09-01

Fixes a crash in the shelf price scanner on iPhones running iOS 15.5 to 16.3. If price scanning stopped working for you on an older iPhone, this release restores it. No other changes.

### 2.2.0 — 2026-08-09

A cleaner, faster scan report:
- The summary now leads with what matters -- your household verdict and Diet Quality up top, with each detail one tap away.
- Nutrition, Additives, Ingredient hazards, What we read, Better choices and Sources each open as their own screen instead of one long scroll.
- Android: the back button now steps back a screen instead of closing the app, and the header no longer sits under the status bar.
- Fixes and polish throughout.

Informational only, not medical advice -- always read the physical label.

### 2.1.5 — 2026-08-08

- Deals now show the dates their prices were advertised, so you always know how current a price is.
- Directions to the store from any deal, using your phone's own maps app.
- Your Basket Report now shows product photos and per-100 g nutrition.
- Clearer product names on the Family Shelf -- long names no longer squash the card.
- Better contrast and readability across the deals and basket screens.

Informational only, not medical advice -- always read the physical label.

### 2.0.11 — 2026-07-22

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.

### 2.0.8 — 2026-07-16

What2Know 2.0 is our biggest update yet -- built from your feedback.

• Numbers that match your package: nutrition now leads with per-serving values the way your label prints them, with per-100g alongside and a one-tap "Rescan the label" whenever you want the report rebuilt from the box in your hand.
• Scan a meal or dish: point at a plate for an estimated calorie range, what we spotted on it, and a "Complete your plate" read based on Canada's Food Guide and USDA MyPlate.
• Personal-care products get a full report: every ingredient explained by its role, plus a check against the EU's 26 declarable fragrance allergens.
• Six diet plans (Mediterranean, Low carb/Keto, Intermittent fasting, Plant-based, Gluten-free, Paleo) and six goals that genuinely shape each report -- your plan reads the product's own numbers.
• A smarter pet suite: dog and cat specific checks, custom pet allergies, and clear red "not for pets" flags.
• Better choices, in-app: cleaner-scoring options with photos and scores -- never a web search.
• Shopping trip budget: a big green running total and a progress bar marked in dollars, so you know where you stand before the checkout belt.
• Faster, steadier scanning -- plus dozens of reliability fixes throughout.

Questions or ideas? Tell us right inside the app -- Settings > Help us build What2Know.

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*