Allergy Apps: How to Choose a Pollen, Food or Symptom Tracker You Can Trust

An allergy app can tell you when to keep the windows shut, help you spot patterns in your symptoms, and keep your emergency plan in your pocket. But apps are only as good as their data, and a food scanner can’t replace reading the label. The most useful question to ask about any allergy app is: where does this information come from?

This guide explains the trustworthy free data sources behind pollen and air quality alerts, what to look for in food and symptom apps, and the safety features worth setting up today. For more, see our living with allergies guides.

Jump to: Quick answer · Pollen apps · Air quality · Food allergy apps · Symptom diaries · Emergency features · FAQ

Quick answer

• Pollen: look for apps that show actual measured counts, not just forecasts. AAAAI’s National Allergy Bureau (NAB) publishes counts from its counting stations and offers free email alerts.
• Air quality: the EPA’s free AirNow app shows your local Air Quality Index, forecasts and a fire and smoke map.
• Food: barcode scanners can help, but always read the ingredient label yourself.
• Symptoms: a simple daily log of symptoms, medicines and exposures gives your allergist useful information.
• Emergency: store your allergy information and emergency contacts in your phone’s medical ID, and carry your epinephrine.

Pollen apps: counts vs forecasts

The American Academy of Allergy, Asthma and Immunology (AAAAI) explains the difference that matters most:

• Pollen counts are actual measurements: an instrument, usually on a rooftop, collects pollen and spores for 24 hours, and a lab identifies and counts them. Counts are reported for trees, grasses, weeds and mold.
• Pollen forecasts are predictions based on the previous year’s counts and current weather.

Some apps show forecasts or modeled estimates rather than counts. These can be useful for planning, but they’re less precise than a real count from a nearby station. AAAAI’s National Allergy Bureau reports counts from its stations; you can see them at aaaai.org/nab and sign up for free email alerts at pollen.aaaai.org.

What to look for in a pollen app

• Clear sources: does it say whether it shows measured counts or a forecast, and from where?
• Separate numbers for trees, grasses, weeds and mold, so you can track the ones you react to.
• Alerts you can set for high days.

Once you know the count is high, act on it; see our pollen avoidance guide and how the seasons affect allergies.

Air quality apps

Air pollution and wildfire smoke can make asthma worse, according to AAAAI. The EPA’s AirNow app is free for iPhone and Android. It shows the current Air Quality Index for your area or saved places, current and forecast air quality, a map of PM2.5, PM10 and ozone monitors, and the AirNow Fire and Smoke Map made with the U.S. Forest Service. It doesn’t focus on pollen, so pair it with a pollen source.

For what to do on bad air days, read air quality and summer asthma.

Food allergy apps

Food allergy apps often scan barcodes or list ingredients. They can save time, but a database may be out of date, and recipes change. The American College of Allergy, Asthma and Immunology (ACAAI) advises checking ingredient labels carefully and learning other names your allergen goes by.

• Use the app as a first check, then read the label on the package in your hand, every time.
• Know the nine major allergens the FDA requires on labels: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans and sesame.
• Restaurants are different. The FDA notes most unpackaged food served by restaurants isn’t covered by labeling rules, so ask staff directly. See dining out with food allergies.

Symptom diaries

A symptom diary helps you and your allergist see patterns: which days, places or foods line up with your symptoms, and whether your medicine is working. A useful diary records:

• Your symptoms and how bad they were.
• Medicines you took and when.
• Where you were and what you did (outdoors, cleaning, around pets).
• For food, what you ate and when symptoms started.

Some apps are built for this. MASK-air, for example, is an app for people with allergic rhinitis that has been used in published real-world studies of symptoms and treatment. A paper notebook works too; what matters is recording consistently and bringing the results to your appointment.

Emergency features worth setting up

• Medical ID: add your allergies, medicines and emergency contacts to your phone’s built-in medical ID, which can be set to show on the lock screen.
• Your action plan: keep a photo or copy of your allergy or asthma action plan on your phone.
• Epinephrine reminders: set calendar reminders to check expiration dates. ACAAI says epinephrine is the first-line treatment for anaphylaxis and advises carrying two doses.

An app never replaces calling 911 in an emergency.

Privacy

Health apps collect sensitive information. Before you sign up, check what data the app collects, whether it shares or sells it, and whether you can delete your account and data.

This guide is general information, not medical advice. Read our medical disclaimer.

Frequently asked questions

What is the best pollen count app?

Look for one that shows measured counts from a nearby station, not just a forecast, and breaks them down by trees, grasses, weeds and mold. AAAAI’s National Allergy Bureau also offers free email alerts based on its station counts.

Are allergy forecasts accurate?

Forecasts are predictions based on past pollen data and the weather, so they’re less precise than an actual count. They’re still useful for planning ahead.

Can I trust food allergy scanner apps?

Use them as a helpful first check, but always read the ingredient label on the package. ACAAI advises checking labels carefully and learning other names for your allergen.

Is there a free air quality app?

Yes. The EPA’s AirNow app is free for iPhone and Android and shows the Air Quality Index, forecasts and a fire and smoke map.

Should I track my allergy symptoms?

Yes, especially before an allergist visit. Recording symptoms, medicines and exposures helps spot patterns and shows whether treatment is working.

Sources

• American Academy of Allergy, Asthma and Immunology. Controlling hay fever symptoms (pollen counts, NAB).
• U.S. Environmental Protection Agency. AirNow mobile app.
• American Academy of Allergy, Asthma and Immunology. Your questions answered on air pollution, wildfires and asthma.
• American College of Allergy, Asthma and Immunology. Food allergy.
• U.S. Food and Drug Administration. Food allergies.
• Example MASK-air study: Impairment of EQ-5D-5L domains according to allergic rhinitis and asthma control: a MASK-air real-world study. J Allergy Clin Immunol Pract. 2023.

Last reviewed: October 21, 2026.