Verdict
Cal AI turns a meal photo into a calorie and macro estimate in seconds, which makes logging far less tedious than typing in every ingredient. An NIH test of four photo apps including Cal AI found they all undercounted calories and fat, and its own site says it is about 80% accurate. There is no free tier beyond a 3-day trial.
Privacy note. Policy does not say whether photos train AI, allows ad-partner sharing, deletion only by email (calai.app/privacy); meals go to OpenAI and Anthropic models per TechCrunch
Best for
People who want rough calorie logging with almost no effort
Skip if
Anyone needing precise counts, or with a history of disordered eating
Key facts
- Category
- Health, fitness & wellbeing
- Made by
- Cal AI, Inc. (owned by MyFitnessPal since 2026)
- Based in
- United States
- Launched
- 2024
- Works on
- iPhone, Android
- In the UK
- Yes
- Free plan
- none (3-day free trial, then subscription)
What it does
- estimates calories and macros from a photo of a meal
- scans barcodes on packaged food
- logs meals from text descriptions
- uses the phone depth sensor to estimate portion size
- syncs exercise with Apple Health and Google Fit
Ratings
What people say
individual reviewers who like Cal AI value how quick it is, but the most upvoted 2026 threads are about accuracy, especially oil, butter and sauces that a photo cannot see. On X the app is talked about more as a teen-founder business story than as a health tool, with one viral post calling it 'a random number generator for calories'. Store ratings of 4.5 to 4.7 run well ahead of this.
“Cal AI can't identify everything in food, including olive oil, which matters A LOT. I tried it for a few weeks and it couldn't tell the difference between food cooked in an air fryer versus deep-fried in oil.”
Individual user review, 15 February 2026 · source
“I've been using CalAI for a month now and by the claims of the app I should've lost 3kg but I barely lost 1kg. Are their claims real?”
Individual user review, 2 September 2026 · source
“I use cal.ai. I like it alot. I haven't been using it to it's full potential even”
Individual user review, 23 September 2026 · source
“Cal AI is basically a random number generator for calories and they exited for 9 figures 😭”
Post on X, 2 March 2026 · source
“Today I’m starting to track my calories w cal ai … I recommend you do too”
Post on X, 22 April 2026 · source
Press reviews
- Nutritional Outlook 2026-07-30
Reports an NIH Clinical Center test of 102 weighed meals through MyFitnessPal, LoseIt!, Cal AI and Appediet; all four underestimated calories and fat, and users should 'take the results with a grain of salt' (preliminary, not peer reviewed).
- TechCrunch 2025-03-16
The claimed 90% accuracy 'appears to be good enough for many dieters'; the app uses Anthropic and OpenAI models, and TechCrunch could not verify the founders' download and revenue figures.
- HealthDay 2026-07-27
Headline coverage of the same NIH test: photo calorie apps underestimate calories and fat (article body did not load, headline and title only).
Privacy
- Trains on your data
- unclear: the privacy policy (effective 21 May 2026) says it may use machine learning and AI to improve the service but does not say whether food photos train models; TechCrunch reported it sends meals to Anthropic and OpenAI models
- Opt-out
- No AI-training opt-out stated. Targeted-advertising sharing can be adjusted in cookie settings or the app profile; deletion by emailing privacy@calai.app
- Retention
- 'As long as necessary to fulfill the purposes outlined in this Policy' (no fixed period)
- Age limit
- Policy bars under-13s in the US and under-18s in the EEA, and does not mention the UK; UK App Store 4+, Google Play PEGI 3
FAQ
Is Cal AI free?
No. It has a 3-day free trial and then needs a subscription. Prices shown in the UK App Store run from £2.99 to £29.99 depending on the plan, and the app tests different prices on different users.
How accurate is Cal AI?
Cal AI's own site says about 80%. An NIH test presented in 2026 found Cal AI and three other apps underestimated calories and especially fat, so oily or mixed meals are likely to read low.
Who owns Cal AI?
MyFitnessPal bought it in a deal announced in March 2026 and runs it as a separate app. It was started in 2024 by teenagers Zach Yadegari and Henry Langmack.
Cal AI or MyFitnessPal?
Cal AI is built around the photo and is quicker to use. MyFitnessPal has a much larger food database and barcode scanning, and in the NIH test it was more accurate on higher-calorie meals.
Scores are based on published evidence, not lab tests. How we score.
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