Help center
Kairo Help Center
The official guides for Kairo, the AI calorie tracker for iPhone: getting started, photo scan and corrections, subscription and billing, Apple Health and Apple Watch, accuracy, privacy and support. Written by the team that builds the app.
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Getting started & scanning
- Getting started & scanning
What is Kairo and how do I get started?
Kairo is an AI calorie tracker for iPhone: photograph a meal, read off calories and macros. How to set up the app and run your first scan.
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How does scanning work and how do I correct a result?
The four ways to log a meal in Kairo: photo, description by text or voice, barcode and a photo of a menu. Plus: editing values, adjusting by description, deleting an entry.
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How accurate are Kairo's calorie numbers?
Kairo's numbers are AI estimates. Benchmark of 2026-06-16: 16 of 16 cases passed, about 3.5% mean error on branded items, 10–12% on generic whole foods. Re-run 2026-08-25: 21, 23 and 22 of 23 passed.
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Subscription & billing
- Subscription & billing
What can I use without a subscription, and what needs one?
What you can use in Kairo without a subscription: three AI analyses per account (photo, describe, menu scan, barcode AI fallback) and unlimited barcode lookups. From the fourth AI analysis on you need a subscription.
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How much does Kairo cost and how does the free trial work?
Kairo Unlimited costs $3.99 per week or $44.99 per year (£3.99 / £44.99, €3.99 / €49.99). Only the yearly plan has a 3-day free trial; the weekly plan bills immediately. Billing runs through the App Store.
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How do I cancel my Kairo subscription and how do I get a refund?
How to cancel your Kairo subscription in iOS Settings (Apple ID → Subscriptions) and request a refund from Apple at reportaproblem.apple.com. Refunds are decided by Apple, not by Kairo.
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Apple Health, Watch & devices
- Apple Health, Watch & devices
How do I connect Kairo to Apple Health, and which data is synced?
Kairo writes the calories, protein, carbohydrates and fat of every meal to Apple Health and reads active energy, resting energy and your weight. How to turn the sync on and off.
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What can Kairo do on Apple Watch?
The Kairo app for Apple Watch shows your calorie and macro status and your streak, logs recently eaten foods from your wrist and comes with watch face complications. Requires watchOS 9.4 or later.
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Which devices and languages does Kairo support, and how do I reach support?
Kairo runs on iPhone with iOS 16.4 or later, with an Apple Watch app for watchOS 9.4 or later. There is no Android version. The app is available in seven languages; support is reachable by email.
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Didn't find your answer?
Email support at support@kairocalories.com, in English or German. Kairo is operated by Centaurio UG (haftungsbeschränkt), Hofheim am Taunus, Germany.
Kairo reads your meal from a photo and shows calories and macros. For iPhone, with Apple Health and Apple Watch.
Download on the App Store