The NutriLens reading list

Food tracking and nutrition guides

A meal photo is a starting point for understanding food. These guides show you how to check a portion, read the numbers and keep a record that is useful the next time you eat a similar meal.

Try the free calorie & macro calculator →

Choose your starting point

Start with the photo guide if you want a quick estimate. Choose the homemade-meals worksheet when you know the ingredients. The calories-versus-macros guide explains the numbers, and the photo-log guide turns occasional scans into a repeatable routine.

Nutrition

How to Estimate Calories from a Food Photo

Learn what an AI food photo can estimate, what it can miss, and how to check portions and hidden ingredients before using a calorie result.

Read the guide →Nutrition

Calories vs Macros: How to Read Your Meal Numbers

Understand calories, protein, carbs and fat with a worked meal example, a grams-to-calories table, and tips for reading a food scan.

Read the guide →Nutrition

How to Track Calories in Homemade Meals

Use an ingredient worksheet and a batch-to-portion calculation to estimate homemade meal calories, including mixed recipes and leftovers.

Read the guide →Nutrition

How to Keep a Food Photo Log You Can Actually Use

Try a simple seven-day food photo log with a daily checklist, a weekly review template, and practical ways to record portions and context.

Read the guide →

From the guide to the app

Put it into practice with NutriLens

NutriLens analyzes meal photos and provides estimated calories and macronutrients. Check the identified food and portion before using a result. Hidden ingredients and cooking methods can change the estimate.

Take the next step

Get NutriLens.

Scan a meal. Explore estimated calories and macros.

Free to download · iPhone, iPad & Android · Optional in-app purchases

App Store ↗Google Play ↗

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