Answer · 2026

Which app tracks protein from a photo of my meal?

Several apps do. Cal AI photographs a plate and returns calories, protein, carbs, and fat. SnapCalorie, MacroFactor, and Cronometer Photo Log also log protein from a picture. A photo cannot weigh the serving. Confirm the foods. Oils stay invisible. The protein number is an estimate.

Updated October 10, 2026 · Written by LAYERTWO, the makers of NutriCam. We make NutriCam. The other apps on this page are not ours, and we say where they are the better pick.

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Apps that return protein from a meal photo

App	What the photo returns	You still review?	Platforms	Price
Cal AI	Calories, protein, carbs, and fat from a photo	Yes. FAQ, last updated July 2026: about 80% accurate. Lighting and a full-frame plate help	iPhone, Android	Scan results need a subscription after a 3-day trial. App Store lists Unlimited plans from $2.99 to $29.99, periods not shown (October 10, 2026)
SnapCalorie	Listing: calories, protein, carbs, fats, plus 100+ micronutrients	Yes. FAQ: add a menu hint or adjust after. Oils when you eat out are an educated guess	iPhone, Android	FAQ: free for up to 3 AI logs a day. Premium $19.99 a month or $149 a year (U.S. App Store, October 10, 2026)
MacroFactor	Photo fills an editable plate of macros, including protein	Yes. Help: edit amounts. Put a food scale in the shot for total weight	iPhone, Android	$11.99 a month, $47.99 per 6 months, or $71.99 a year. No free tier (App Store, October 10, 2026)
Cronometer Photo Log	Protein and the rest of the diary once the foods are confirmed	Yes. The photo is a search into NCCDB and CFCD. Add oil, mayo, and missed extras. Gold only	iPhone, Android, web	Gold $10.99 a month or $59.99 a year (Gold page, October 10, 2026)
NutriCam	Calories, macros including protein, plus vitamins and minerals on the photo card	Yes. Confirm foods and portions before it is the day's record	iPhone only	Free download. Pro is $9.99 a month, or $34.99 to $49.99 a year (U.S. App Store, confirmed August 26, 2026)

Facts above come from each app’s own website, help center, or App Store listing on October 10, 2026. We did not weigh meals, so nothing here is an accuracy ranking.

Use Cal AI when the only question is how much protein was on that plate, and you want the answer on iPhone or Android. Use SnapCalorie when you want a standing free photo log. Use MacroFactor when the photo is a shortcut into weekly calorie and macro targets that change with your weight trend. Use Cronometer when the protein number has to come from a verified diary entry you will still edit.

NutriCam is our app, and it is iPhone only. Photograph a meal or say what you ate, confirm the estimate, and see calories, macros, and vitamins and minerals. Then ask what to eat next from today’s log, targets, workouts, and Apple Health sleep when connected. What the app is: what is NutriCam. How the next-meal answer works: what should I eat next.

A photo cannot weigh the protein

Protein grams are a weight times a food. A camera sees the outside of the plate. It cannot weigh the chicken, see the filling in a burrito, or tell grilled from breaded when the coating is thin. A wrong food guess moves protein more than it moves a calorie total: courgette logged as chicken is a protein error, not a rounding error.

NIH researchers presented tests of four photo apps, including Cal AI, against 102 weighed kitchen meals in July 2026. All four undercounted calories by about 250 to 345 per meal and fat by about 30 grams. That abstract does not publish a protein error. Fat was the nutrient that went missing. Protein still moves when the portion is wrong.

Cronometer’s Photo Log blog, read October 10, 2026, calls the photo an advanced search. It tells you to add missed extras such as butter, cooking oil, and condiments, and to put the plate on a kitchen scale with the weight in the shot. MacroFactor’s AI food logging help, the same day, says to include a fist or a common object for portion estimates, and to photograph the plate with a food scale in view for total weight. Then you edit the plate.

Cal AI’s FAQ, last updated July 2026, says the app is about 80% accurate, and that calories and nutrition values can vary. SnapCalorie’s FAQ, read October 10, 2026, says oils, cooking fats, and sugar in restaurant food are an educated guess from dish type and visual cues. Independent photo tests of ChatGPT meal photographs (O’Hara et al., Nutrients, 2025) found 13 of 16 nutrients more than 10% off. That paper is not a ranking of the apps in the table. It is the same limit: the picture is a guess until you confirm the foods. Kitchen tests of photo calorie apps: how accurate are AI photo calorie counting apps.

Competitive cutting with a food scale is a different job. A photo cannot give gram accuracy. Confirm the foods. Change the portions. Barcode a pack when you can.

No app can measure a meal from a photo. A picture cannot show oil, sauces, hidden ingredients, or portion weight. Every number from every app on this page is an estimate until you correct the foods and portions. We have not run an accuracy test across these apps, so this page makes no accuracy ranking.

Remaining protein after you log the plate

A protein count on one plate is not the day’s leftover. “Hit my protein” is a running total. No phone sees lunch unless you log it. Photograph it, say it, scan it, or type it. Then remaining protein is a real number.

MyFitnessPal’s Nutrition Coach, read October 10, 2026, uses remaining calories and protein from the diary you already kept. Its example of a useful question is “I have 400 calories left and I’m 20g short on protein.” Coach cannot log the meal. Meal Scan is Premium, and the Premium page that day describes scanning a barcode or an individual food item. That is a diary coach, not a mixed-plate protein camera.

Welling’s FAQ, the same day, says a photo of the plate logs estimated calories and macros, and that you can ask for food ideas for remaining calories and macros. Wearable burn is a guess you can turn off. iPhone and Android.

Foods that close a leftover protein hole: what to eat after a workout if you are short on protein, and 400 calories left and 40 g of protein. Gym photo apps by job, not only protein: photo calorie trackers for gym goers on iPhone. Vitamins from a plate photo: which app tracks micronutrients from a photo. Photo-first vs an advisor: NutriCam vs Cal AI.

NutriCam, which we make, photographs a meal or takes a spoken sentence, then answers what to eat next from today’s log, targets, workouts, and Apple Health sleep when connected. The App Store listing, read October 10, 2026, names recipes based on remaining macros for the day and dietary preferences. Confirm the portion before you trust the remaining grams. Skip it if you need Android, a verified food database, or MacroFactor’s weekly expenditure algorithm.

Photograph the plate, confirm the foods, then treat remaining protein as the cue. NutriCam is an iPhone advisor: photograph a meal or say what you ate, confirm the estimate, and see remaining protein. It does not plan training, compute adaptive TDEE, or time carbs for an endurance event, and it is not on Android.

FAQ

Can a photo measure how many grams of protein are on my plate?

No. A camera cannot weigh chicken or see filling under the top layer. Protein grams move with portion size and with a wrong food guess. Cronometer and MacroFactor tell you to put a kitchen scale in the shot. Confirm the foods. The number is an estimate, not a lab value.

Does Cal AI show protein from a meal photo?

Yes. Cal AI's website, read October 10, 2026, says a photo returns calories, protein, carbs, and fat. Scan results need a subscription after a 3-day trial. Its FAQ, last updated July 2026, says the app is about 80% accurate. Confirm the plate. We have not run an accuracy test.

Which of these photo protein logs is free?

SnapCalorie's FAQ, read October 10, 2026, says free for up to 3 AI logs a day. NutriCam's free tier includes photo logging, with limits, and is iPhone only. Cal AI scan results need a subscription after a 3-day trial. MacroFactor has no free tier. Cronometer Photo Log is Gold.

Do I still have to confirm the foods after I take the picture?

Yes. Cronometer's Photo Log blog calls the photo an advanced search, then you add oil or mayo. MacroFactor's help page sends you to an editable plate. Cal AI's FAQ says scans can be wrong. NutriCam asks you to confirm portions before the log is the day's record.

Which of these apps work on Android?

Cal AI, SnapCalorie, MacroFactor, Cronometer, and Welling are on Android. NutriCam by LAYERTWO is iPhone only. If you need Android, skip NutriCam. Cal AI is the fast photo protein count on both phones.

Is a protein number from a food photo a lab value?

It is an estimate. None of these apps is a medical device. NIH kitchen tests of four photo apps, including Cal AI, undercounted calories and fat. A photo cannot weigh the serving. Confirm foods and portions. See a clinician if you need medical nutrition.

Sources

Every fact about another app on this page comes from that app’s own site, help center, or store listing, checked October 10, 2026. Prices and features change. Check the live listing before you buy.