Can iOS 27 Count Calories? Siri Mode's Food Scan vs a Calorie Tracker

Callie is our app, and it is one of the tools compared with Apple's new feature below. Every claim about Apple links to Apple's own pages or to named reporting, checked on October 20, 2026.

The 30-second answer

No, not the way a calorie tracker does. iOS 27, released on September 14, 2026, adds Siri mode in Camera, which Apple says lets you look up "nutritional info for a plate of food" (Apple's iOS 27 release notes). You get an answer about one plate. Nothing keeps a food diary, adds up your day or adapts a calorie target, and beta-era reports say nothing is saved to the Health app. Apple's own descriptions never mention calories. The feature also needs an iPhone 15 Pro or later, and on October 20, 2026 Apple listed it as English only and unavailable in the EU and China mainland.

For a quick read on whether a meal is heavily processed, it's useful and built in. For a calorie number you can add up across the day, you still need a tracker.

Apple's food scan vs calorie trackers at a glance

The biggest difference isn't accuracy. Apple's feature answers a question and moves on, while a tracker keeps a dated record you can add up.

Feature	Callie	iOS 27 Siri mode	MyFitnessPal / Cronometer
Calorie number per meal	Per food, editable	Not promised by Apple; reports differ
Macros (protein, carbs, fat)		Flags protein and sugar (beta reports)
Portion estimate	From photo depth data, you edit it	Not documented	You enter amounts; photo scan on paid plans
Daily log and history
Adaptive calorie target	Re-tuned every 2 weeks		Formula-based
Apple Health sync		Not saved to Health (beta reports)
Languages	App in 6 languages	English only (October 2026)	MyFitnessPal 20, Cronometer English
Devices	iOS 18.2+ and Android	iPhone 15 Pro or later	iOS 18.0+ / iOS 15.5+
Annual US price	$34.99 after 3 AI logs	Included in iOS 27, usage limits	$79.99 / $59.99 premium tiers

MyFitnessPal and Cronometer both have free tiers. MyFitnessPal's Meal Scan is Premium only ($79.99 a year), and Cronometer added photo logging to Gold ($59.99 a year) in September 2025. The App Store lists MyFitnessPal in 20 languages and Cronometer in English only.

What Apple actually shipped in iOS 27

Apple shipped a camera mode that answers questions about food, not a food log. Apple announced it at WWDC on June 8, 2026 and released iOS 27 on September 14, 2026.

The feature lives inside Siri mode, a new mode in the Camera app that brings Visual Intelligence into the camera. In its June announcement, Apple listed actions such as splitting a bill with Apple Cash and the ability to "get nutritional insights about a plate of food" (Apple Newsroom). Its Apple Intelligence page calls it getting "nutritional information on a dish in front of you", and the demo image shows chicken phở with its common ingredients and nutrition information.

To use it, Apple's support guide says to hold the Camera Control, tap Siri, point the camera and tap to ask. You can swipe down on Siri's answer to ask follow-up questions. So "ask Siri about your food" describes it better than "food scanner". It is part of Siri AI, which Apple labels a beta.

What the food scan tells you

It gives a quick, qualitative read on a meal: how processed it looks and what is good or bad about it, rather than a nutrition label.

Most of the detail on the output comes from reporting during the summer betas, because Apple's own pages describe the feature in one line. MacRumors' August 4, 2026 health guide said it "gives food a nutritional value ranking between very low and very high" and flags whether food is heavily processed, contains protein or is high in sugar. Sahha's July 7, 2026 developer write-up describes the same ranking as an in-the-moment impression. MacRumors' Visual Intelligence guide from August 6, 2026 adds that Siri can read ingredient lists to check for allergens and can scale recipes.

Because it's Siri, you can keep asking: what's probably in the sauce, how to make the dish lighter, or whether it suits a high-protein day. For a single meal you're curious about, that's a useful answer you didn't have before.

What it doesn't do

It keeps no record. Each answer stands alone, so at the end of the day there is nothing to add up.

• No calorie count from Apple. Apple's descriptions never use the word calories. MacRumors' August guide said it doesn't give exact calorie counts. A MacRumors how-to published on September 16, 2026, two days after release, says it can tell you how many calories a food has, so asking may get you a number. Either way, the number isn't stored.
• No food diary or daily total. Nothing collects breakfast, lunch and dinner into one day.
• No saving to Health. MacRumors and Sahha both reported during the beta that the data doesn't sync to the Health app, and Apple's release notes don't say otherwise.
• No portion step. Apple doesn't document how it judges portion size, and there's no screen to correct the amount.
• No target. iOS 27 doesn't set a daily calorie budget or adjust one as your weight changes.
• Usage limits. Apple's support page says server-based Siri AI features have daily limits and that expanded access will cost a fee in the future.

Who can use it: iPhones, languages and regions

Fewer people than iOS 27's install base. Siri mode needs an Apple Intelligence iPhone set to English, in a country outside the EU and China mainland.

• iPhones. iOS 27 runs on iPhone 11 and later. Siri mode needs an iPhone 15 Pro, iPhone 15 Pro Max or any iPhone 16 model or later. By our count, 14 of the 33 iPhone models in Apple's iOS 27 user guide qualify.
• Languages. Apple Intelligence works in 16 languages, but Siri AI, which runs Siri mode, launched on September 14 as an English-only beta. Apple said French, Japanese, Korean, Portuguese and Spanish would follow in October 2026, and Macworld found them in the iOS 27.2 beta. On October 20, Apple's feature availability page still listed Siri mode in Camera as English only. German and Arabic aren't in the announced next wave.
• Regions. Apple says Siri AI won't initially be available in the EU on iOS, and it isn't available in China mainland. It isn't offered to users under 13.

For comparison, Callie's app runs in 6 languages, including German and Arabic, on iOS 18.2+ and Android.

What happened to Health+ and food logging in Health

Neither shipped in iOS 27. The Health app change in iOS 27 is perimenopause and menopause support in Cycle Tracking.

Before WWDC, MacRumors reported on April 29, 2026 that iOS 27 would let you scan nutrition labels for calorie and macro tracking in the Health app. Apple's announcements and release notes don't include it. Separately, Bloomberg reported on February 5, 2026 that Apple had scaled back its AI health coach, code-named Project Mulberry and reportedly called Health+ inside Apple, and would release parts of it individually.

What Apple did announce on September 14, 2026 is a redesigned Health app with an Insights tab arriving later this year. Its summary covers six areas: heart, sleep, readiness, fitness, vitals and cycle tracking. Nutrition isn't one of them. Health still stores the dietary energy and macros that calorie apps write into it, which our Apple Health sync guide covers.

How accurate is a camera estimate?

Nobody has published an accuracy test of Siri mode's food answers yet. Tests of similar AI models working from photos land around 30% to 36% energy error.

We found no independent test of Siri mode as of October 20, 2026. The closest evidence is research on general AI models and photo apps:

• A 2025 study in Current Developments in Nutrition found ChatGPT-4o and Claude 3.5 Sonnet both at 35.8% mean absolute percentage error for energy across 52 food photos.
• A November 2025 study in Nutrients put ChatGPT-5 at 30.5% energy error from the image alone across 195 dishes, falling to 13.9% when it also had the ingredients.
• NIH researchers presenting at NUTRITION 2026 in July found four photo-based apps underestimated meals by roughly 250 to 345 kcal when nobody corrected the portions.

In our own 20-meal kitchen-scale test, Callie averaged 13% error and Cal AI 17%. That's our test, not an independent one, and the method is on the Callie vs Cal AI page. Our round-up of AI calorie accuracy research and Can ChatGPT count calories? go further.

When you need a calorie tracker

You need a tracker when the goal depends on a total, not on one meal. A calorie deficit is a daily sum, and a one-off answer can't give you that.

Pick a tracker if:

• You log every day and want a running total and weekly averages without doing the maths.
• Your target should move with your weight. Callie re-tunes its calorie target every 2 weeks from your weight trend. MyFitnessPal and Cronometer set targets from a formula.
• You want to check portions before saving. In Callie, every photo opens a review screen with foods, portions, calories and macros, and nothing is logged until you confirm.
• You eat packaged food. A barcode scan gives label values, which is better than any camera estimate.
• You want it in Apple Health. Trackers write dietary energy and macros next to your weight and activity.
• You don't use English or live in the EU. Siri mode isn't available to you yet.

Cronometer is the pick for micronutrient depth, with 84 nutrients on its free tier. MyFitnessPal has the largest food database. Our iPhone calorie tracker guide compares them.

Where Callie fits

Callie is an AI calorie tracker, so it does the camera part too. The difference is what happens after the photo.

You can log by photo, voice or text. A photo estimate opens on a review screen where you fix the food, the portion and the hidden oil before anything is saved. Callie reads the depth data your iPhone stores in the original photo to estimate portion size. Every log lands in a dated diary with daily totals, macros and a streak dashboard, and it syncs with Apple Health on iPhone and Health Connect on Android. The app runs in English, French, Spanish, German, Arabic and Japanese, and it needs iOS 18.2 or later. Callie has no Apple Watch app.

Callie isn't free. You get 3 AI logs to try it, then it's $34.99 a year in the US. That's less than half of MyFitnessPal Premium ($79.99), but more than the Siri mode feature that comes with iOS 27 on a supported iPhone. Details are on our pricing page.

When Apple's food scan is the better choice

Apple's built-in feature is enough when you want a verdict on a meal, not a record of your day. It's already on your iPhone and costs nothing extra, within Apple's usage limits.

Stick with Siri mode if:

• You want a quick "is this processed?" check at a restaurant or a supermarket, without opening another app.
• You don't want to count. Some people do better without numbers, especially if tracking has made them anxious about food (more on that here). A very-low-to-very-high read on processing and protein is plenty for eating a bit better.
• You want answers, not a log. Siri handles follow-up questions about ingredients, allergens and recipes.
• You have a supported iPhone set to English, outside the EU and China mainland.

If you later want totals, trends and a target, a tracker can sit alongside it. Not sure which kind of user you are? Our which calorie tracker guide gives one pick for each.

Sources

1. Apple Newsroom (June 8, 2026). "Apple introduces Siri AI, a profoundly more capable and personal assistant." https://www.apple.com/newsroom/2026/06/apple-introduces-siri-ai-a-profoundly-more-capable-and-personal-assistant/
2. Apple Newsroom (June 8, 2026). "Apple unveils next generation of Apple Intelligence, Siri AI, and more." https://www.apple.com/newsroom/2026/06/apple-unveils-next-generation-of-apple-intelligence-siri-ai-and-more/
3. Apple Newsroom (September 14, 2026). "Major updates for Apple's software platforms are now available." https://www.apple.com/newsroom/2026/09/major-updates-for-apples-software-platforms-are-now-available/
4. Apple Newsroom (September 14, 2026). "Siri AI, a profoundly more capable and personal assistant, is here." https://www.apple.com/newsroom/2026/09/siri-ai-a-profoundly-more-capable-and-personal-assistant-is-here/
5. Apple Support (published September 29, 2026). "About iOS 27 Updates." https://support.apple.com/en-us/149076
6. Apple Support, iPhone User Guide (accessed October 20, 2026). "Siri AI: Use Siri mode in Camera on iPhone." https://support.apple.com/guide/iphone/siri-ai-use-siri-mode-in-camera-iphu1x9m94ybz8j/ios
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8. Apple (accessed October 20, 2026). "Apple Intelligence and Siri." https://www.apple.com/apple-intelligence/
9. MacRumors (August 4, 2026). "iOS 27: All the New Health and Fitness Features." https://www.macrumors.com/guide/ios-27-health-app/
10. MacRumors (August 6, 2026). "Here's What's New With Visual Intelligence in iOS 27." https://www.macrumors.com/guide/ios-27-visual-intelligence/
11. MacRumors (September 16, 2026). "iOS 27: Use Visual Intelligence in the Camera App." https://www.macrumors.com/how-to/ios-use-visual-intelligence-camera-app/
12. MacRumors (April 29, 2026). "iOS 27 Camera App to Get 'Siri' Mode With Nutrition Label Scanning." https://www.macrumors.com/2026/04/29/ios-27-camera-app-siri-mode/
13. Sahha (July 7, 2026). "iOS 27 for Health & Fitness Developers." https://sahha.ai/blog/ios-27-health-fitness-developers/
14. 9to5Mac, citing Bloomberg (February 5, 2026). "Apple reportedly scales back plans for AI-powered health coach." https://9to5mac.com/2026/02/05/apple-reportedly-scales-back-plans-for-ai-powered-health-coach/
15. Macworld (September 17, 2026). "First glimpses of Siri AI in French, Spanish and other new languages appear." https://www.macworld.com/article/3238075/first-glimpses-of-siri-ai-in-french-spanish-and-other-new-languages-appear.html
16. Fridolfsson J, Sjöberg E, Thiwång M, Pettersson S (2025). "Performance Evaluation of 3 Large Language Models for Nutritional Content Estimation from Food Images." Current Developments in Nutrition. https://pmc.ncbi.nlm.nih.gov/articles/PMC12513282/
17. Rodríguez-Jiménez et al. (November 19, 2025). "Image-Based Dietary Energy and Macronutrients Estimation with ChatGPT-5." Nutrients 17(22):3613. https://pmc.ncbi.nlm.nih.gov/articles/PMC12655113/
18. Charles O, Hengist A et al. (July 2026). "Accuracy of photo-based dietary tracking applications." Presented at NUTRITION 2026. Press release: https://www.eurekalert.org/news-releases/1136415
19. MyFitnessPal US App Store listing (accessed October 20, 2026). https://apps.apple.com/us/app/myfitnesspal-calorie-counter/id341232718
20. Cronometer US App Store listing (accessed October 20, 2026). https://apps.apple.com/us/app/cronometer-calorie-counter/id1145935738
21. Callie internal 20-meal kitchen-scale benchmark (May 2026). Methodology at https://www.mycallie.app/en/compare/callie-vs-cal-ai