Once you have your macro targets set, the next challenge is tracking them consistently without it becoming a second job. These seven free tools handle different parts of the process, from initial target setting to daily logging to data analysis. Most people benefit from using two or three in combination rather than expecting any single tool to do everything.
1. EvvyTools Macro & Calorie Calculator
Before you can track, you need accurate targets. The EvvyTools Macro & Calorie Calculator runs the Mifflin-St Jeor equation using your age, weight, height, sex, and activity level to calculate your TDEE. From there, it generates protein, carb, and fat targets for weight loss, muscle gain, or maintenance goals.
It is a good starting point because it does not require an account and gives you a complete set of macro targets rather than just a calorie number. For the underlying methodology and how to interpret the output, the guide on calculating macros for any fitness goal walks through every step.
2. Cronometer
Cronometer is a free food logging platform with one of the more comprehensive nutritional databases available without a subscription. It tracks macros, micronutrients, and amino acids, which is useful for anyone trying to verify that their diet is adequate across all major nutrients rather than just hitting protein, carb, and fat totals.
The free tier includes full macro and calorie tracking, progress charts, and diary features. The paid version adds data export and biometric logging integrations.
3. MyFitnessPal
MyFitnessPal has the largest food database of any free logging app, with millions of user-contributed entries in addition to branded and restaurant items. The barcode scanning feature is fast and covers most packaged foods sold in the US and internationally.
The free version tracks calories and macros with daily and weekly summaries. It integrates with fitness trackers and syncs workout data to adjust daily calorie targets based on activity.
4. FoodData Central (USDA)
FoodData Central is the USDA's official nutritional database, which contains detailed nutrient profiles for thousands of foods including raw ingredients, branded products, and experimental data from nutritional surveys. It is not a logging app, but it is the most authoritative source for nutritional data when you need to verify what is actually in a specific food.
Useful when food logging apps give inconsistent entries for the same item, or when you want authoritative data for foods you cook yourself.
5. Lose It!
Lose It! is a calorie and macro tracking app with a clean interface and a food database that covers most common items. The free version supports custom macro goals, barcode scanning, and visual progress charts.
One feature worth noting: it lets you set custom macro percentages rather than just calorie targets, which makes it useful for people following specific macro distributions rather than just counting calories toward a total.
6. Open Food Facts
Open Food Facts is a free, open-source nutritional database built collaboratively. It contains millions of products from around the world, with full ingredient lists, nutrition labels, and allergen information. Unlike corporate databases, all data is freely accessible and exportable.
It integrates directly with several third-party apps and can be queried directly for product-specific data. Useful for verifying data in other apps or for developers building nutrition-related tools.
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7. Nutritionix Track
Nutritionix Track uses natural language input to log food. You type "two scrambled eggs and a slice of whole wheat toast" and it parses the entry and pulls nutritional data. This works well for people who find barcode scanning or manual searching slow, especially for home-cooked meals with multiple ingredients.
The free version handles most daily logging needs. The restaurant database is particularly strong, making it useful for anyone who eats out frequently.
How to Use These Together
Most effective macro trackers use a combination: a calculator to set targets, a daily logging app to track intake, and the USDA database to verify data when entries look wrong.
A reasonable setup: use EvvyTools to calculate your initial macro targets, use Cronometer or MyFitnessPal to log daily food intake against those targets, and reference FoodData Central when you need to verify a specific food's nutritional profile. Recalculate your targets every six to eight weeks using the macro calculator as your weight changes.
What to Look for in Any Logging Tool
The best tracking tool is the one you actually use every day. Accuracy requires consistency more than it requires precision. A tool you log in for seven minutes per day produces better results than a perfect system you abandon after two weeks.
The Dietary Guidelines for Americans and the CDC's nutrition resources both frame consistent dietary patterns as the primary driver of health outcomes, which is also what the macro tracking research shows: it is the sustained habit, not the perfect tool, that produces results.
Pick the interface that feels least annoying to use every day. The other features matter much less.
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What to Do When Logging Apps Disagree
Different apps frequently show different nutritional values for the same food. This is because their databases pull from different sources, and user-contributed entries vary in quality. When two apps give you meaningfully different protein or calorie counts for the same item, here is how to resolve it:
For branded packaged foods, cross-reference the app's entry against the actual nutrition label on the package. The label is authoritative; the database entry may contain errors or be for a different serving size.
For whole, unprocessed foods like chicken breast or eggs, use FoodData Central as the reference. It contains measured nutritional data from actual food testing rather than manufacturer claims or user submissions.
For restaurant meals, look for the restaurant's official nutrition information on its website. Many major chains now publish detailed nutrition data. If the specific restaurant is not available, choose a database entry that matches the preparation method (grilled, not fried) and is within a realistic range for the portion size you consumed.
Discrepancies of 5 to 10 percent in total daily calories are normal and acceptable. Discrepancies larger than 15 to 20 percent suggest an entry error worth investigating, particularly for a food you eat frequently.
Recalculating When Your Weight Changes
The macro targets you set at the start of a cut or bulk are based on your weight at that moment. As your weight changes, your TDEE changes, and the targets that produced results at month one may be slightly misaligned at month three.
Set a reminder to recalculate your targets every six to eight weeks using your current weight. The EvvyTools Macro & Calorie Calculator makes this quick. Enter your current stats, compare the new targets to what you have been hitting, and adjust if the difference is meaningful (typically more than 100 calories or 10 grams of protein).
Setting Your Targets Before You Start
Logging without targets is just data collection. The missing step for most people is calculating accurate macro targets before they start tracking. Hitting 150 grams of protein per day means nothing if your actual target is 175 grams. The numbers need to be based on your specific body weight, activity level, and goal.
Start with the EvvyTools Macro & Calorie Calculator to generate your targets, then pick one of the logging tools above to track your daily intake against them. The WHO's nutritional guidance provides the broader dietary framework for understanding how macros fit into overall eating patterns, which is useful context for anyone new to structured nutrition tracking.
EvvyTools has the full toolkit including the calorie and macro calculator to get you started with accurate numbers, and the guide on calculating macros for any fitness goal explains the methodology behind those targets in full.
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