AllerGen - Allergy Tracker

In-app purchases
50+
Downloads
Content rating
Everyone
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About this app

AllerGen is your personal food allergy safety companion — built to help you eat safely, shop confidently, and manage your allergies every day.

Whether you're scanning a food label at the supermarket, looking for safe meal ideas, or tracking a reaction, AllerGen is designed to support you with clear, practical guidance based on NHS information.

KEY FEATURES

Allergy Tracking
Add and manage your food allergies with severity levels. AllerGen keeps your allergy profile front and centre so every feature is personalised to you.

AI Label & Barcode Scanner
Use your phone camera to scan food labels or barcodes. AllerGen's AI instantly checks every ingredient against your allergies, flags hidden allergens, warns about cross-contamination risks, and suggests safer alternatives available at UK supermarkets — all aligned with Natasha's Law.

What Can I Eat Instead? (Premium)
Our headline feature. Tell AllerGen what you want to eat and it finds safe alternatives with UK supermarket brands (Tesco, Sainsbury's, M&S, Asda, Waitrose), ingredient swaps, recipes, and even tips for eating out at UK restaurant chains like Wagamama, Nando's, and Pizza Express.

Food Log
Keep a record of what you eat and whether it was safe. Track your meals over time and build a picture of your eating habits.

Reaction Log
Log any allergic reactions with details including the trigger food, severity, symptoms, and notes — helping you keep an accurate record for your GP or allergy specialist.

Allergy Insight Helper (Premium)
AllerGen's AI analyses your food log and reaction log to help you spot patterns you might miss. It suggests questions to ask your doctor and highlights what to monitor going forward. This is not a diagnosis — it supports your awareness and encourages professional consultation.

How-To Guides (Premium)
Search any health or allergy topic and get a clear, step-by-step guide. Topics include what to do after a mild reaction, how to read food labels, safe meal prep, eating out safely, travel tips, and more. All guides reference NHS guidance with direct links.

AI Health Assistant (Premium)
Chat with a supportive AI assistant that can answer questions about allergies, medications, symptoms, and day-to-day management. Responses are based on NHS guidance and use UK-specific medication names and services.

Weather, Pollen & Air Quality
Check today's weather, pollen count, and air quality index right from the home screen — with contextual tips when conditions may affect your allergies.

IMPORTANT INFORMATION
AllerGen is not a medical device and does not provide medical advice. All health information is for awareness purposes only and references NHS guidance. We always encourage you to consult your GP or allergy specialist for personalised advice. In an emergency, call 999.

Free features: Allergy tracking, label and barcode scanning, food log, reaction log, weather and pollen data.

Premium features: Safe alternatives finder, How-To guides, AI Health Assistant, and Allergy Insight Helper.

Built by Octopye Digital Designs.
Website: allergen.octopye.com
Updated on
Feb 24, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Financial info, Photos and videos, and Device or other IDs
This app may collect these data types
Financial info and Device or other IDs
Data is encrypted in transit
You can request that data be deleted

What’s new

Fix created for Weather API

Android: ACCESS_COARSE_LOCATION and ACCESS_FINE_LOCATION permissions
expo-location plugin: Configured with a clear permission message