Looking for the best calorie counter app? An honest UK comparison

There isn’t one best calorie counter app, only the one that suits how you eat and that you’ll keep using. For detailed nutrients, look at Cronometer. For a huge food database, MyFitnessPal. For snapping photos, Cal AI. For protein and muscle protection, ParrotPal, which is our app and wrote this page, so judge it for yourself.

Updated 9 October 2026 · By the ParrotPal team

Key facts

MyFitnessPal says it has 20.5 million foods and Cronometer says it tracks up to 95 nutrients and compounds (both checked 1 October 2026). Cal AI estimates calories and macros from a photo, barcode or description (checked 7 October 2026). ParrotPal, which wrote this page, is an iPhone-only app that logs by voice, text, photo or barcode and is built around protein and a muscle protection score.

Who wrote this. ParrotPal made this page, and ParrotPal is one of the four apps. We’ve kept to facts each company publishes about itself, left out prices and ratings, and said where another app may suit you better.

Best for detailed nutrients: Cronometer

If you want to see vitamins and minerals as well as calories, Cronometer is built for it. Its website says it tracks up to 95 nutrients and compounds, has a database of over 1 million verified foods and a free barcode scanner, and runs on the web, iPhone and Android. There’s a free version, with paid upgrades. Checked 1 October 2026.

Best for a huge food database: MyFitnessPal

MyFitnessPal’s website says it has 20.5 million foods and tracks calories, macros, vitamins and other micronutrients, plus water, weight, exercise and steps. It also offers Meal Scan photo logging and Voice Log. It’s on iPhone, Android and the web. The account is free; its site lists Barcode Scan among its paid Premium tools. Checked 1 October 2026. Our MyFitnessPal alternative page goes further.

Best for photo logging: Cal AI

Cal AI is built around the photo: snap your meal and it estimates calories, protein, carbs and fat. Its website says you can also scan a barcode or describe your meal, and that it uses your phone’s depth sensor to work out food volume. Its App Store listing says food scanning results need a subscription. Its own FAQ says it is “about 80% accurate”. Checked 7 October 2026. More in is Cal AI accurate?

Best for protein and muscle protection: ParrotPal (our app, so judge for yourself)

ParrotPal is an iPhone app built by a UK team. You log food by voice, typed text, photo or barcode, and review the estimate before it counts. It sets calorie and protein targets and puts protein first.

• LeanShield. A muscle protection score from 1 to 100 that rates protein, strength work and eating enough. It doesn’t measure muscle.
• Workouts. It suggests workouts to lift your score.
• iPhone only. There’s no Android app, and no free version: it’s a 7-day free trial, then a subscription.

Can talking be accurate enough? Our founder logged every meal by voice for 13 days to make a weight limit: the voice logging case study has the numbers.

The four apps side by side

Sources: myfitnesspal.com; cronometer.com; Cal AI’s App Store listing and calai.app; the ParrotPal App Store page. We haven’t compared prices or ratings, because they change and depend on the plan you pick. Check each app before you sign up.

How to choose

• Your phone. On Android, ParrotPal is out. MyFitnessPal and Cronometer have Android apps, and Cal AI’s help pages cover Android.
• How you like to log. Searching a database suits people who like detail. Photo, voice and text suit people who find logging a chore. Our guide to AI calorie trackers explains where each method goes wrong.
• What you want to see. Every nutrient, or just calories and macros, or protein and muscle.
• Your shopping. In a free trial, scan a few things from your usual UK supermarket and check the app gets them right.
• Your target. Whatever you pick, start with a sensible number. Our calorie deficit calculator gives you one.

Accuracy matters less than you’d think. AI photo estimates vary widely, with average calorie errors from under 1% to 38% in one review (Shonkoff et al., 2023). But across weight-loss studies, keeping a food diary at all was consistently linked with losing more weight (Burke et al., 2011). The app you keep opening beats the perfect one you abandon.

What the research says

• Across weight-loss studies, keeping a food diary was consistently linked with losing more weight.

  Burke LE, Wang J, Sevick MA. (2011). Self-monitoring in weight loss: a systematic review of the literature. Journal of the American Dietetic Association 111(1):92–102. doi:10.1016/j.jada.2010.10.008

• A review of 52 studies of AI that estimates food from photos found average calorie errors from under 1% to 38%, with smaller errors for single, simple foods.

  Shonkoff E, Cara KC, Pei XA, et al. (2023). AI-based digital image dietary assessment methods compared to humans and ground truth: a systematic review. Annals of Medicine 55(2):2273497. doi:10.1080/07853890.2023.2273497

Research describes the people who were studied. Where we quote our own members’ figures, they are what members logged, and the method is on our methodology page.

Try ParrotPal free for 7 days and compare it for yourself. 4.7★ on the App Store · iPhone. Get it on the App Store

Questions people ask

Related guides and data

• MyFitnessPal alternative: how ParrotPal is different
• Is Cal AI accurate? An honest comparison
• AI calorie trackers: how they work and how to check them
• Calorie deficit calculator