A food allergy app for kids can scan a barcode and flag an allergen that appears in the product data it holds. It cannot promise a food is okay for your child. Recipes change, databases have gaps, and "may contain" labels are voluntary, so the label in your hand and your child's allergist plan always come first.
- An app can flag a listed allergen fast, but the label and your child's allergist plan come first.
- Apps miss things: recipes change, data has gaps, and "may contain" labels are voluntary.
- If your child avoids milk or several foods, watch calcium, vitamin D and protein, ideally with a dietitian.
How Sito handles allergies
- Per child. You pick each child's allergies from 13 options: the nine US major allergens plus celery, mustard, sulfites and lupin.
- Barcode card. On a match, the card names your child's allergen, hides the score and removes the log button.
- When we could not check. Only the product card says so: when the allergen list is missing or unreadable, or when the label says it may contain your child's allergen, which we do not clear. It asks you to read the pack.
- Search, My Scans and meal rows. These show "Contains X" on a match and nothing otherwise. No warning on a row does not mean the food was checked.
- Photos and typed foods. A photo-logged row warns only when the matched database food names the allergen. We cannot see inside a home-made dish, and a food typed in by hand with no database match carries no allergen data.
- Data gaps. On August 17, 2026, only 58% of about 1.06 million scored branded products in our database had any allergen list.
- Milk allergy. Sito adds a note to watch calcium and vitamin D, tracked daily against age targets. The targets do not change.
As our card puts it, allergen data can be incomplete or out of date, so a warning is a reason to check the pack, never a substitute for reading it. Sito has no restaurant features, emergency plan, epinephrine reminders or caregiver card.
Set your child's allergies once
Pick allergies per child; a matching barcode shows the warning first and tells you to read the label.
Read the label first
US packaged food labels must declare nine major allergens: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans and sesame. Sesame became the ninth under the FASTER Act, effective January 1, 2023 (FDA).
- Look in parentheses after an ingredient, like "whey (milk)", or in a "Contains" statement.
- The type of tree nut and the species of fish and crustacean shellfish must be named.
- "Milk" includes goat and sheep milk; "eggs" includes duck and quail eggs (FDA FAQ).
The law does not cover meat, poultry and egg products regulated by USDA, raw agricultural commodities, highly refined oils, or most unpackaged retail and restaurant food, and the FDA "has not established a threshold level for any allergens" (FDA). The EU requires 14 allergens to be declared, adding celery, mustard, lupin and others (JMIR mHealth and uHealth).
What "may contain" means
"May contain" and "produced in a facility" statements "are not required by law" (FDA), and there are "no standards that define what they mean" (ACAAI).
- The wording "is not based on the amount of allergen present." In a 2016 FARE-funded study, 37% of consumers managing food allergy assumed the wording reflects the risk of cross-contact (FARE blog, 2018).
- "The absence of an advisory label does not mean that a product is safe" (FARE).
- "Ask your doctor if it is OK to eat products with advisory labels." With no label or any doubt, "don't eat it" (Kids With Food Allergies).
Why an allergy app can be wrong
- Recipes change. Ingredients "can be changed at any time" (FDA), so check even familiar foods (eatright.org).
- Databases have gaps. Open Food Facts, where Sito's barcode data comes from, is contributor-entered, does not guarantee allergen or trace data, and "must not be used for medical purposes." Many products have no allergen list.
- Labels can be vague. Sometimes ingredients are not fully labeled, and words like "natural flavors" or "spices" "could include a variety of ingredients" (HealthyChildren.org).
- Apps cannot see your kitchen. To avoid cross-contact at home, the AAP advises clean utensils, plates, pans and serving trays, and not storing unsafe foods with safe foods (AAP).
- Apps need testing. A 2020 study of allergy apps said food product apps "should be tested in clinical trials" (JMIR).
Other apps say so too. Yuka ignores "may contain" traces and "cannot guarantee the accuracy of the data." AllergyEats is "a guide, not a guarantee."
A routine to use with any app:
- Read the whole label every time you buy (Kids With Food Allergies).
- Call the manufacturer if unsure (FARE).
- Treat "no warning" as "not checked."
- Keep the plan current: at diagnosis, each school year and "when the allergy list changes" (HealthyChildren.org).
If your allergist asks you to log meals and symptoms, our food diary guide has an allergy diary section.
What allergy organizations say to keep ready
- When your child is away from you, at a friend's or family member's house, school, child care or camp, "have a written plan" (AAP). The AAP offers an Allergy and Anaphylaxis Emergency Plan.
- "Your allergist should prescribe an epinephrine auto-injector and teach you how to use it. You should also be given a written treatment plan" (ACAAI).
- "Anyone who has ever had an allergic reaction to food should always have at least two doses of epinephrine auto-injector or nasal spray readily available" (AAP).
- "For anyone experiencing anaphylaxis, epinephrine should be given right away followed by a call to 911 for further treatment and transfer to a hospital" (AAP).
- "A mild allergic reaction does not always mean the allergy is mild" (FDA).
Other food allergy apps (checked September 14, 2026)
Each does a different job, per its own listing. Android is shown where we found a Google Play listing. Whichever you use, read the label.
| App | What it does | Platforms and price (as listed) |
|---|---|---|
| Spokin | Reviews of restaurants, hotels and allergists from people with the same allergies, recipe checks, guides | iOS: free |
| AllergyEats | Peer ratings of US restaurants for allergy friendliness | iOS: free. Android |
| Fig | Barcode ingredient check against diets and allergies; Fig+ unlocks Restaurants, Multiple Figs and Unlimited Scans | iOS: free, Fig+ from $5.99. Android |
| Yuka | Product scores; Premium diet alerts include gluten-free, lactose-free, soy-free and sulfite-free (no peanut, tree nut, egg, fish, shellfish or sesame alert) and ignore traces (Yuka for kids) | iOS: free, Premium $10 to $20. Android |
| Allergy Force | Food scan and search, epinephrine auto-injector reminders, a reaction guide customized with the doctor's instructions, sharing with up to 5 family members | iOS: free, Premium $1.99/month or $19.99/year |
| Belay | Share a child's allergy profile, emergency plan and auto-injector location with caregivers | iOS: free. Android |
ContentChecked and iAvoid appear on some list posts, but we could not find either in the US App Store.
For scanners that score packaged food rather than check allergens, see our food scanner app guide.
Eating well while avoiding milk or several foods
Avoiding foods can leave the eating plan "lacking in important nutrients," and a registered dietitian nutritionist can help (eatright.org, ACAAI).
- A milk-free diet can lose protein, calcium, riboflavin, phosphorus and vitamins A, D and B12 (Kids With Food Allergies).
- Vitamin D, calcium and omega-3 fatty acids are "well documented to be deficient micronutrients in children with IgE-mediated food allergies" (Meyer et al., 2015).
- Milk alternatives "often contain less protein and less calories" than cow's milk; most are fortified with vitamin D and calcium (HealthyChildren.org). Plant milks such as almond, rice and oat "often lack protein" (eatright.org).
- Compare Nutrition Facts labels for calcium, protein, vitamin D and no added sugars (eatright.org), and work with your child's doctor or a registered dietitian (Kids With Food Allergies).
| Age | Calcium (RDA) | Vitamin D (RDA) |
|---|---|---|
| 1 to 3 years | 700 mg | 600 IU |
| 4 to 8 years | 1,000 mg | 600 IU |
| 9 to 18 years | 1,300 mg | 600 IU |
Source: HealthyChildren.org, which also says to talk with your pediatrician before giving any supplements. More in is my toddler getting enough nutrients.
Food allergy app FAQ
Is there an app that scans for allergens?
Yes. Fig and Allergy Force list food scanning in their App Store listings, and Sito's barcode card flags your child's allergens when the product data we hold names them. An app is only as good as its data, and ingredients "can be changed at any time" (FDA), so read the label every time.
Does "may contain" mean my child can't eat it?
The label is voluntary, and its wording "is not based on the amount of allergen present" (FARE). Ask your child's doctor whether products with advisory labels are okay (Kids With Food Allergies).
Can an app tell me if my child is allergic?
No. If you suspect an allergy, the FDA says to "contact a health care provider for appropriate testing and evaluation" (FDA).
This page is general information, not medical advice. Follow your child's allergist's plan.
Sources
- FDA, Food Allergies
- FDA, Food Allergen Labeling FAQ
- FDA, Food Allergies: What You Need to Know
- FARE, How to Read a Food Label
- FARE blog, precautionary allergen labeling
- HealthyChildren.org, Food Allergies in Children
- HealthyChildren.org, Allergy and Anaphylaxis Emergency Plan
- HealthyChildren.org, Managing Food Allergies at School
- HealthyChildren.org, Cow's Milk Alternatives
- ACAAI, Food Allergy
- Kids With Food Allergies, Milk Allergy
- eatright.org, Food Allergies and Intolerances
- eatright.org, Non-Dairy Solutions
- Open Food Facts, Terms of use
- JMIR mHealth and uHealth, 2020
- Meyer et al., Clinical and Translational Allergy, 2015
- Yuka Help, Food preferences
- Yuka Help, Paid version features
- App Store listings: Spokin, AllergyEats, Fig, Allergy Force, Belay, Yuka
- Google Play listings: AllergyEats, Fig, Yuka, Belay