The best AI calorie tracker depends on what you eat.

How this list works

How we picked, and what we left out.

Every app below estimates food from a photo with AI. We read each maker’s own site, help pages or store listing on 19 October 2026 and describe them in their own terms. We don’t quote prices (they change by country and by week) or star ratings, and nobody paid to be here.

We make PlateDiary, so weigh that in. PlateDiary is on the list for one job — eating out — and it is not the answer for most of the others.

At a glance

Eight AI calorie trackers, one line each.

Best for…

The picks, one by one.

Honourable mention: YAZIO pairs AI photo entry and barcodes with built-in fasting timers, on phones and the web.

• Fastest photo-to-number: Cal AI. “Track your calories with just a picture.” It says it uses your phone’s depth sensor to judge volume, adds barcode scanning and a describe-it option, and calls itself about 80% accurate in its own FAQ. MyFitnessPal bought it in 2026 and runs it as a separate app.
• Measured portions: SnapCalorie. Built by ex-Google AI researchers who co-founded Google Lens, it measures food volume with depth sensors on supported iPhones and draws its data from the USDA database.
• The biggest database: MyFitnessPal. More than 20 million foods, with Meal Scan for photos and Barcode Scan in Premium, plus weight, exercise and over 40 connected apps and devices.
• A weight-loss plan with photo entry: Lose It!. “Say It. Snap It. Scan It.” — Smart Camera, voice and barcode, a database of 56+ million items, and Apple Health and Google Fit for exercise.
• The most detail: Cronometer. Tracks up to 95 nutrients against a database of over a million verified foods, with AI photo entry, a free barcode scanner and sync with Fitbit, Garmin, Oura, Apple Health and more.
• Coaching that adapts: MacroFactor. Estimates how much energy you burn from what you eat and how your weight moves, and adjusts your plan weekly. Its AI photo entry can pick out several foods on one plate, and you can add a few words to sharpen it.
• A guided programme: Foodvisor. Photo, voice, search and barcode entry inside a personal plan with fasting, workouts and a “seed” that grows as you complete daily quests.
• Restaurant tables you want to remember: PlateDiary. One photo of the whole table, every dish cut out on your phone, one rough “~” number per dish when you turn Calories on, and the night kept with its place and companions.

What they share

Every photo app has the same blind spot.

A preliminary NIH test presented in July 2026 photographed 102 weighed meals and ran them through four photo apps — MyFitnessPal, Lose It!, Cal AI and Appediet. All four came in low, by about 250 to 345 calories on average, and missed about 30 g of fat. It is a conference abstract, not yet peer reviewed, but it matches what you would expect: a photo can’t see the butter.

Oil, butter, sauce and what’s hidden under the noodles are where photos go wrong — which is exactly what restaurant kitchens add generously. Whatever app you choose, treat a photo number as a starting point you can correct. More in how accurate AI calorie counters are.

Choose in a minute

A six-question checklist before you download.

• Where do most of your meals come from? Packets → a barcode app. Your kitchen → a database app and a scale. Restaurants → a photo app, ideally one that handles a whole table.
• Do you share plates? Then per-dish matters more than per-plate.
• Do you want weight and exercise in the same app? MyFitnessPal, Lose It!, MacroFactor and Foodvisor do that; PlateDiary doesn’t.
• Do you want it in Apple Health or Health Connect? Most full trackers sync; PlateDiary deliberately never writes there.
• Are you happy to make an account? Most of these need one. PlateDiary doesn’t have accounts at all — see calorie trackers with no account.
• Do you want calories every day, or only sometimes? PlateDiary’s Calories are off unless you turn them on, and the rest of the app works without them.

Where we fit

Where PlateDiary fits, and where it doesn’t.

PlateDiary is not a full calorie tracker: there is no barcode scanner, no food database to search, no exercise and no weight. The calorie switch, typed numbers and the Calories page are free; photo estimates use 10 free AI tries, then the PlateDiary AI membership.

• Off unless you turn them on. With Calories off, PlateDiary is a food diary for eating out and shows no numbers at all.
• One photo of the table. Every dish and drink is cut out on your phone into its own save. A read gives each dish one rough “~” number, rounded to the nearest 10.
• Accept or correct. Accept makes the number yours; Edit lets you type your own. PlateDiary remembers your correction for that dish at that place.
• No AI needed. Type your own number on any food or drink save, free.
• The Calories page adds up each day’s saved meals over a week, 4 weeks, 12 weeks or a year, in four tabs: Summary, When, Dishes and Where.
• An optional daily number, only if a number helps — shown as “~750 left” or “~250 past”, in the same colour either way.
• No account. Nothing is written to Apple Health or Health Connect, and calorie values never go to analytics.

In PlateDiary

A rough number for the dishes you save — only if you want one.

Sources

Where the facts come from