How does Kairo track calories?

Kairo uses advanced AI to analyze photos of your food and automatically calculate calories and macronutrients. Simply take a photo of your meal, and Kairo does the rest.

Is Kairo available on Android?

Currently, Kairo is exclusively available for iOS devices. We are working on an Android version for the future.

How much does Kairo cost?

Kairo offers a yearly subscription with a 3-day free trial, as well as a monthly subscription. You can test all features during the trial and cancel anytime before it ends.

Does Kairo work with Apple Health?

Yes, Kairo fully integrates with Apple Health to sync your nutrition data and provide a comprehensive health overview.

How many calories do I need per day?

Your daily calorie needs depend on factors like age, gender, weight, height, and activity level. Kairo automatically calculates your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) based on your profile using the scientifically recognized Mifflin-St Jeor equation.

What is the difference between BMR and TDEE?

BMR (Basal Metabolic Rate) is the number of calories your body burns at rest to maintain basic functions. TDEE (Total Daily Energy Expenditure) includes your BMR plus calories burned through physical activity and digestion. TDEE is the total number of calories you need per day.

What is the Body Map in Kairo?

The Body Map is a unique Kairo feature that shows you at a glance how your nutrition supports different body systems — brain, heart, muscles, bones, digestion, and skin & immune system. It provides personalized insights based on your daily food intake.

What makes Kairo different from other calorie trackers?

Kairo combines AI-powered food scanning with features like Body Map nutrition insights, social group tracking with emoji reactions, streak motivation systems, and beautiful iOS widgets. It focuses on simplicity and design while providing comprehensive nutrition tracking.

What is BMI and how is it calculated?

BMI (Body Mass Index) is calculated by dividing your weight in kilograms by your height in meters squared: BMI = weight / (height in m)². A BMI of 18.5-24.9 is considered normal weight. Note that BMI does not account for muscle mass or body composition.

All Foods

Apple vs Lemon

Calories, macronutrients and nutrition facts compared side by side (per 100g).

Fruits

Apple

52 kcal0.3g Protein

per 100g

Fruits

Lemon

29 kcal1.1g Protein

per 100g

Nutrition Comparison

Per 100g	Apple	Lemon
Calories	52kcal	29kcal
Protein	0.3g	1.1g
Carbs	13.8g	9.3g
Fat	0.2g	0.3g
Fiber	2.4g	2.8g
Sugar	10.4g	2.5g
Sodium	1mg	2mg

Green marks the more favorable value (fewer calories/sugar/sodium, more protein/fiber).

Key Takeaways

Lemon has 23 fewer calories per 100g than Apple (79% less).
Lemon delivers more protein (1.1g vs 0.3g per 100g).
Lemon has more fiber (2.8g vs 2.4g).
Apple contains less fat (0.2g vs 0.3g).
Lemon has less sugar (2.5g vs 10.4g).

Apple

Apples are rich in soluble fiber (pectin), which supports gut health and helps regulate blood sugar. They contain quercetin and other polyphenols linked to lower risk of cardiovascular disease. The peel holds most of the fiber and antioxidants, so eat them unpeeled when possible.

View Apple nutrition →

Lemon

Lemons are very low in sugar for a fruit and exceptionally high in vitamin C. The citric acid in lemon juice can enhance non-heme iron absorption from plant foods and is used to brighten dishes without added salt.

View Lemon nutrition →

Track Apple & Lemon in Kairo

Scan your food with AI and automatically track calories and macros. No manual entry needed.

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