Cal AI review: cost and free version

You download Cal AI, answer a series of questions about your weight, activity and goal, and the app builds your plan. The price question comes up when you try to log your first meal by photo. The App Store listing spells it out: food scanning analysis results require a subscription. The official FAQ confirms it indirectly: the + button you tap to log food opens the paywall screen.

What Cal AI gives you for free is therefore a 3-day trial, promoted on its website. It turns into a paid subscription unless you cancel in time. We found no mention of a free version you can use with no time limit, whether on the website, the App Store or the FAQ.

Cal AI does not publish a price list. The price appears on the paywall screen, in the app, before you start the trial. The App Store listings still give a sense of scale, with the in-app purchases offered in each country. One quirk: almost all of them are named “Unlimited” and Apple does not show their length, so you cannot tell which one is a weekly, monthly or yearly plan.

On the App Store, Cal AI is very well rated in all five countries we checked, with 4.8 out of 5 in the US from 372,736 ratings and 4.7 in France from more than 12,000. The app is updated every week, according to its version history.

Cal AI explains that your phone’s depth sensor estimates the food’s volume, then its AI works out the calories, protein, carbs and fat. In its own FAQ, the app says it is about 80% accurate and recommends good lighting and a well-framed plate.

An independent study gives a sense of scale. In July 2026, NIH researchers presented an analysis of 102 meals prepared and weighed in a metabolic kitchen at the NUTRITION 2026 meeting. The four apps tested, MyFitnessPal, LoseIt!, Cal AI and Appediet, underestimated calories by 250 to 345 kcal per meal on average, mostly because of fat (about 30 g too little). These are preliminary results, not yet published in a journal.

Cal AI is published by Viral Development LLC and launched on the App Store in April 2024. Its founders, Zach Yadegari and Henry Langmack, were 19 at the time of the acquisition, according to TechCrunch. MyFitnessPal acquired Cal AI in a deal closed in December 2025 and announced on March 2, 2026, for an undisclosed amount. According to MyFitnessPal, the app had more than 15 million downloads at the time and over $30 million in annual revenue.

For you, this changes two things. Cal AI remains an independent app with its own subscription: paying for MyFitnessPal does not give you Cal AI, and the reverse is also true. On the other hand, Cal AI now relies on the MyFitnessPal food database (20 million foods), which helps with packaged products and manual searches.

You cannot cancel Cal AI from inside the app: it all goes through your phone’s settings. Deleting the app does not cancel the subscription, and you must cancel the free trial at least 24 hours before it ends to avoid the first charge.

Cal AI suits you if you want a photo-first counter that also reads nutrition labels, works on an Apple Watch and uses the MyFitnessPal database, and you do not mind a subscription. The 3-day trial is enough to see whether photo logging really saves you time.

If your main goal is to log meals by photo without subscribing, compare before you pay. Ember, the app that publishes this guide, includes up to two AI analyses a day on its free plan, with no time limit; on the other hand, it does not read nutrition labels and has no Apple Watch app. We cover the differences in our Ember vs Cal AI comparison.