quick answer
Pick Cal AI if you want the simplest photo calorie counter, use Android, or want the lowest price.
Pick EXO if you want more than calories: vitamins and minerals, supplements counted with food, nutrition label scans, Apple Health sleep and heart data, and AI meal and workout plans in one iPhone app.
EXO and Cal AI at a glance
| EXO | Cal AI | |
|---|---|---|
| Calories from a meal photo | Yes | Yes |
| Barcode scan | Yes | Yes |
| Nutrition label scan | Yes, including labels in other languages | Yes, through the camera (FAQ) |
| Describe a meal in words | Yes, typed or dictated | Yes |
| Food database search | Yes, built on USDA data | Uses MyFitnessPal's food database (TechCrunch) |
| Vitamins and minerals | 13 vitamins and 11 minerals | Not listed |
| Supplement tracking | Yes, with label scans | Not listed |
| Apple Health data used | Steps, workouts, sleep, heart rate, HRV | Steps (FAQ) |
| Meal plans | AI, a meal, day or week | Not listed |
| Workout plans | AI strength plans | Not listed |
| Platforms | iPhone | iPhone, Android |
| Languages | 8 | 15 |
| US App Store rating | 5.0 (1 rating) | 4.8 (372,681 ratings) |
| On the App Store since | August 2026 | April 2024 |
From each app's US App Store listing and website, read October 26, 2026. Looking for other options? See the best Cal AI alternatives. "Not listed" means the app does not mention it on its listing or site.
Logging a meal
Both apps start the same way: point the camera at your plate and get calories, protein, carbs and fat in a few seconds. Cal AI's site says it also estimates volume with the depth sensor on newer iPhones and lets you describe a meal in words or scan a barcode.
EXO gives you six ways in: photo, barcode, nutrition label, typed or dictated description, a food database built on USDA FoodData Central, and saved meals and recipes. After any scan you can change a portion, or tell EXO what was different ("it was cooked in butter") and it fixes the numbers.
Is Cal AI accurate?
No photo calorie app is exact, and we could not find an independent accuracy study of Cal AI. The most useful public data so far is a preliminary NIH study presented at NUTRITION 2026. Researchers weighed 102 meals and found that photo logging in MyFitnessPal, Lose It!, Cal AI and Appediet came in about 250 to 345 calories low on average, mostly from missed fat like oil and dressing. Per app figures were not published.
The same advice applies to EXO and every other photo app: check the portion, and add cooking oil, butter and sauces when you can see them. That is why EXO puts portion edits and plain language corrections right on the result.
Nutrients and supplements
This is the biggest difference. Cal AI's listing and site talk about calories and macros and do not list a vitamin, mineral or supplement view. EXO tracks 13 vitamins and 11 minerals, plus fiber, sugar, sodium, saturated fat, omega-3 and omega-6. Supplements go in the same log, so your vitamin D from salmon and your vitamin D from a softgel add up to one number. You can see which nutrients run light over the week, not just today.
If you take supplements, or want to eat better and not only less, EXO shows you far more.
Sleep, activity and plans
EXO reads steps, active energy, workouts, sleep, heart rate, resting heart rate and HRV from Apple Health and puts them next to what you ate. It can build a meal plan that fits your targets and a strength plan with sets, reps and form pictures. Cal AI's listing and site focus on food logging and progress, and do not list meal or workout plans.
Price
| EXO | Cal AI | |
|---|---|---|
| Free version | No, free trial on yearly plans | No, scan results need a subscription; 3 day free trial |
| Yearly | $79.99, with a $39.99 offer for some new users | About $29.99 according to third party guides |
| Shorter plans | Weekly $6.99, 3 months $29.99 | Monthly about $9.99 according to third party guides |
US prices from the App Store in-app purchase lists, read October 26, 2026. Cal AI's listing does not label plan lengths, so its yearly and monthly prices come from third party guides. Prices change and vary by country.
Who should choose Cal AI
- You want the simplest possible photo calorie counter.
- You use Android, or switch between iPhone and Android.
- Price matters most.
- You like an app with hundreds of thousands of reviews behind it.
Who should choose EXO
- You take supplements and want them counted with your food.
- You care about vitamins and minerals, not only calories.
- You want sleep, activity and heart data from Apple Health next to your meals.
- You want a meal plan or a workout plan from the same app.
The verdict
Cal AI is the better pick for fast, low cost calorie counting, and it is on Android. EXO is the better pick if you want one iPhone app that counts calories from a photo and also keeps track of vitamins, minerals, supplements, sleep and training. Both offer a free trial, so the easiest test is to log the same three meals in each and keep the one you open again tomorrow.
Sources
- Apple App Store US listings and in-app purchase lists: Cal AI and EXO, read October 26, 2026.
- calai.app, home page and FAQ, read October 26, 2026.
- TechCrunch. MyFitnessPal has acquired Cal AI, March 2, 2026.
- American Society for Nutrition. Photo-based calorie-tracking apps may underestimate energy in meals, NUTRITION 2026 abstract from NIH NIDDK researchers, July 25, 2026. Preliminary, not peer reviewed.
EXO makes this comparison. We are not affiliated with Cal AI and were not paid by anyone for it. Tell us at [email protected] if something here is out of date.
