Calorie Cub ›

An AI calorie counter that gets its numbers from real food data

Updated November 2, 2026
TL;DR
Most AI calorie counters are good at recognizing food and weaker at judging how much of it you’re eating. Calorie Cub uses AI only to work out what you ate, from a photo, your voice, or a chat with your assistant. The calories come from a catalog built on USDA data and restaurants’ published nutrition, and you confirm the match before it’s logged. Tracking is free on the web, with a small daily photo and voice allowance.

How AI calorie counters work

An AI calorie counter takes a photo or a description, works out which foods it’s looking at, estimates the portion, and turns that into calories and macros. Those are three separate jobs, and each can go wrong on its own.
Recognizing food is the strong part. Portions are the weak part, because a photo doesn’t show weight, what’s underneath, or the oil it was cooked in.
What studies found about AI calorie accuracy ›

What to look for in one

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    Where the numbers come from: a food record you can inspect, or a model’s estimate.
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    A confirmation step: you should see the match and the portion before anything is saved.
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    Quick corrections: you’ll change portions often, so it should take a tap.
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    More than photos: barcodes are more exact for packaged food, and voice is quicker when you’re not at the table.
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    Your data: whether you can export or delete it, and what happens to your photos.
Be careful with accuracy percentages in app reviews. We didn’t find an independent benchmark across these apps, and many of the rankings are published by the apps themselves.

How Calorie Cub uses AI

The AI works out what you meant. Foods are matched to a catalog built from USDA data and restaurants’ own published nutrition guides, and each one is labeled official, reviewed, or estimated. In photo and voice logging, the model never supplies the nutrition. In a chat, if a food isn’t in the catalog, your assistant can save it as a custom food, labeled estimated, and you can correct it later.
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    Log by photo: take or upload a picture of your meal, and Calorie Cub finds catalog foods for you to confirm. Each match asks you to check the amount.
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    Scan a nutrition label: a photo of the Nutrition Facts panel fills in a new food for you to review, and it flags numbers that don’t add up.
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    Log by voice: say what you ate, confirm the matches, then add them. Nothing is logged until you tap Add.
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    Barcodes: type the digits on the web to find packaged foods.
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    Log by chat: connect ChatGPT, Claude, or another assistant through MCP, and tell it what you ate.
See which assistants can connect ›

Which way of logging to use

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    Packaged food: use the barcode or the label. It’s the most exact.
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    Restaurant meals: search the chain’s menu. More than 25 of the biggest US chains are in the catalog.
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    A plate you can see: use a photo, and check the amounts.
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    Hands full or on the move: use voice.
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    Already chatting with an assistant: tell it what you ate.
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    Food you make often: save it as a recipe, then log it in one step.
Browse restaurant nutrition facts ›

A free AI calorie counter?

Tracking in Calorie Cub is free with no time limit, including the food catalog, restaurant menus, recipes, favorites, and export. Free accounts also get a small daily allowance of photo and voice logging, and one assistant can read your diary.
Pro raises the photo and voice allowance and lets assistants log for you: $6.99 a month, or $39.99 a year with a 3-day free trial.

Privacy

Calorie Cub doesn’t store your meal photos or voice recordings. They’re sent to Cloudflare Workers AI to find your foods, Cloudflare doesn’t keep them after answering, and we keep only a daily count of what you used. We don’t sell data or show ads, and you can export everything as JSON or delete your account in Settings.
Read the privacy policy ›

Food diary, not medical advice

An AI calorie counter estimates and can be wrong, so check anything that matters. Calorie Cub isn’t a doctor or dietitian. If you’re pregnant, have diabetes or another condition, take weight-loss medication, or have a history of disordered eating, talk to a clinician before you start counting calories.

Questions people ask

How accurate are AI calorie counters?

They recognize common foods well and struggle more with portions and mixed dishes. Accuracy depends on the app and the meal, so check the amounts, and use a barcode or label when you can.

Is there an AI calorie counter that doesn’t need photos?

Yes. In Calorie Cub you can log by voice, by chat with your assistant, or by searching the catalog, without ever taking a photo.

Can an AI calorie counter track macros too?

Calorie Cub tracks calories, protein, carbs, and fat for each entry, and you can set goals for them.

Do I need ChatGPT or Claude to use it?

No. The photo, voice, and search logging are built into Calorie Cub. Connecting an assistant is optional.

Other guides

Use ChatGPT to help you diet ›ChatGPT diet plan and meal plan prompts ›Is ChatGPT accurate for calories? ›Use Claude to help you diet ›Use Gemini to help you diet ›Use Grok and Grok Bot to help you diet ›How logging meals by chat works ›

Try Calorie Cub free

Sign in with Google, then log from the app or connect your assistant. No card needed.
How Calorie Cub works