Last reviewed: 8 May 2026
Food scanner apps let you scan barcodes and instantly see nutrition info, calories, allergens, and additives — without reading tiny labels or typing food names. They're the fastest way to track what you eat, check ingredients, and make healthier choices while shopping.
This guide shows you exactly how to use a food scanner app, from your first scan to advanced tracking features.
A food scanner app uses your smartphone camera to read product barcodes and instantly fetch nutrition data from a database. Instead of manually searching for "Tesco skimmed milk" and scrolling through results, you scan the barcode and get the exact product in 2 seconds.
Popular food scanner apps in the UK include MyFitnessPal (large international database, calorie-focused), Yuka (health-score ratings based on nutrition and additives), and Nutracheck (UK-specific, premium subscription).
We make NutraSafe — built for UK supermarkets, free to download, with barcode scanning and basic logging on the free tier (25 a day). NutraSafe Pro (£3.99/month, iOS) adds unlimited logging, allergen warning detail, AI Coach and AI meal scan. Side-by-side comparison.
Choose a food scanner app from the App Store (iOS) or Google Play (Android).
Our app: NutraSafe — UK barcode scanner, no ads. Free to download (25 scans a day on the free tier). NutraSafe Pro is £3.99/month for unlimited scans plus AI Coach and AI meal scan.
When you first open the app, it will ask for camera permission. Tap "Allow" so the app can scan barcodes.
If you accidentally denied access, go to your phone's Settings → [App Name] → Camera → Enable.
Look for the black-and-white striped barcode on the back or side of the packaging. Most UK food products have a 13-digit EAN barcode.
Common barcode locations:
Open the app and tap the "Scan" or barcode icon (usually at the bottom center of the screen).
Point your camera at the barcode. A rectangular outline will appear on screen — position the barcode inside it.
Tips for better scanning:
Modern apps auto-scan when the barcode is in focus — you don't need to press a button. Within 1-2 seconds, the product info will appear on screen.
The app displays:
If you're tracking calories or meals, tap "Add to Diary" or "Log".
Select:
The app calculates total calories and macros based on your portion.
Every UK food label lists nutrition per 100g. Food scanners pull this data and show:
The full ingredient list in descending order by weight. This helps identify:
Food scanner apps automatically detect common allergens:
If you set up your allergy profile in the app, you'll get instant warnings when scanning products containing your allergens.
We tag every E-number on a scan with its category and a plain-English note. The food additive scanner page covers how it works:
Learn more: What Are E-Numbers?
Most food scanner apps give each product some kind of overall score. Yuka uses an A-F letter grade plus a /100 number; Nutri-Score uses an A-E EU label. We give every product an overall score — Excellent, Good, Poor or Bad — alongside a composition strip showing nutrition per 100g, processing classification and watchlist flags for additives and allergens.
Causes: Product not in the database (new items, niche brands, fresh bakery goods)
Solutions:
Causes: Torn packaging, curved surfaces, poor lighting
Solutions:
Causes: Barcode reused, database error, regional variations
Solutions:
Before going to the supermarket, scan products at home that you want to buy again. Save them to "Favorites" for quick logging later.
At cafes and fast food chains (Pret, Greggs, Starbucks), packaged items have barcodes. Scan them to get accurate calorie counts instead of guessing.
Scan two similar products (e.g., two brands of peanut butter) side-by-side to compare:
Choose the healthier or lower-calorie option.
If the barcode doesn't work, you can take a photo of the nutrition label in our app and the AI extracts calories, protein, carbs and fats. (AI meal scanning is a NutraSafe Pro feature.)
Beyond standard allergens, you can set custom alerts for:
Get NutraSafe on the App Store
See full comparison: Best Food Scanner Apps UK 2026
Most have free versions with limited features (e.g., 25 scans/day, ads). Premium versions (£2-£10/month) offer unlimited scans, advanced tracking, and ad-free experience.
Yes, most apps require internet to fetch product data from their servers. Some apps cache recently scanned items for offline access.
Very accurate for packaged UK foods. Apps pull data directly from official nutrition labels. UK-focused apps — including ours and Nutracheck — tend to have better UK product coverage than international apps.
Fresh produce doesn't have barcodes. You'll need to search manually (e.g., "banana") and select the weight. Some apps have quick-add buttons for common fruits/veg.
Only if they're pre-packaged (e.g., Pret sandwiches, Greggs pastries). For made-to-order restaurant meals, you'll need to estimate or use the app's restaurant database if available.
Yes, standard EAN barcodes work across all UK supermarkets:
Food scanner apps turn your smartphone into a nutrition detective. Instead of guessing calories, reading tiny labels, or manually searching databases, you scan once and know exactly what you're eating.
Start simple:
After a week of scanning, you'll know the nutrition content of your regular foods by heart — making healthier choices becomes automatic.
Ready to scan your first food? Get NutraSafe on the App Store and scan any UK barcode in under 60 seconds.
← Back to BlogFree to log up to 25 foods/day · NutraSafe Pro £3.99/month for AI Coach, allergen warning detail and full reaction history.