Guides

An app is only as good as the habits around it. These guides cover the parts no award can judge for you: how to start, how to log the awkward meals, and how to keep tracking useful rather than stressful. They work with any app. For quick definitions, see the food tracking glossary.

Getting started

How to Choose a Food Tracking App You Will Actually Keep Using
The best food tracker is the one you still open in three months. Choose on four things, in this order: how fast you can log your real meals, how trustworthy the food data is, what the free plan really covers, and whether your data stays yours.
How to Start a Food Diary: Your First Fourteen Days
The first two weeks of food tracking decide whether it sticks. Spend week one logging honestly without changing anything, and week two building the shortcuts that make logging quick. Only then start adjusting what you eat.
What Makes Good Food Data? Verified, Crowd-Sourced and Lab-Analysed Entries Explained
A food tracker's numbers come from its database, and databases are built in different ways. Verified entries are checked before they appear; crowd-sourced entries are added by users and vary in quality; lab-analysed data comes from measured samples. Knowing which you are using tells you how much to trust each number.

Logging skills

How to Log Home-Cooked Meals Without Spending All Evening on It
Home cooking is the hardest thing to log and the most worth getting right. Enter each regular recipe once, weigh the finished pot, and log your bowl as a share of it. After that, a home-cooked dinner takes seconds.
How to Log Restaurant Meals Without Guessing Wildly
Restaurant meals are usually larger and richer than the same dish at home. Use the restaurant's own nutrition information where it exists, break other dishes into components, add for oil and sauces, and do not let one dinner out spoil a good week of logging.
Portion Sizes Without a Scale: Using Your Hand and Everyday Objects
You do not need a kitchen scale to track food reasonably well. Your hand is a portable guide: a palm for protein, a fist for a cup, a cupped hand for snacks and a thumb for fats. Measure a few dense foods once to calibrate your eye, and estimate the rest.
How to Read a Nutrition Label (US and European Formats)
A nutrition label is the most reliable data you will ever log. Start with the serving size, then calories, then the nutrients you care about. US labels work per serving and use % Daily Value; European labels always give values per 100 g or 100 ml, which makes weighed portions easy.

Nutrition basics

Macronutrients Explained: Protein, Carbohydrate, Fat and Where Calories Come From
Every calorie in your diary comes from one of four sources: protein and carbohydrate at about 4 calories per gram, fat at about 9, and alcohol at about 7. Understanding what each does, and the ranges most adults aim for, makes the macro screen in any food tracker far more useful.
Micronutrients Worth Watching: The Vitamins and Minerals Many Diets Miss
Most people do not need to track every vitamin. The US Dietary Guidelines name four nutrients many Americans under-consume: calcium, potassium, fiber and vitamin D. Add iron, B12 and folate for some groups, and keep an eye on sodium in the other direction.
Energy Balance Basics: How Calories In and Calories Out Really Work
Your weight changes when the energy you eat and the energy you burn are out of balance over weeks. Daily expenditure has three parts: your basal metabolism, the energy used to digest food, and activity. All three shift as your weight changes, which is why simple rules overestimate long-term loss.

For your situation

Food Tracking for Vegetarians and Vegans: What to Watch Beyond Calories
Plant-based diets can meet every nutrient need, but a few take planning: vitamin B12, iron, calcium, vitamin D, zinc, iodine and omega-3 fats, plus enough protein. A food tracker is a good way to check them for a couple of weeks.
Food Tracking for Strength Training: Protein, Surpluses and Cuts
For people who lift, food tracking is mostly about two numbers: protein, and the size of your surplus or deficit. Aim for roughly 1.6 g of protein per kilogram a day spread across meals, keep surpluses and deficits modest, and judge changes on a four-week weight trend.
Food Tracking With Diabetes: Carb Counting Basics and Working With Your Care Team
For many people with diabetes, a food diary is mainly a carbohydrate diary. Learn to count carbohydrates in grams, keep meals consistent, log glucose readings beside your meals if you measure them, and set every target with your diabetes care team.

Living with a tracker

Food Tracking Without Counting Calories
Tracking food does not have to mean counting calories. A photo diary, a hunger and fullness scale, or a simple habit checklist can show you a lot about your eating with far less effort, and they suit people for whom numbers become stressful.
How Long Should You Track Your Food?
There is no rule that you must track forever. Most people get the biggest benefit from a learning phase of a few weeks, a focused phase while they work toward a goal, and then a lighter maintenance phase with occasional check-ins.
A Privacy Checklist for Food Tracking Apps
A food diary is health data. Before you commit months of it to an app, spend ten minutes on eight checks: the store privacy label, permissions, health-platform access, account security, export, deletion, sharing settings and what happens if you stop paying.