What's the Best App to Track Protein Intake? Top Options Reviewed

What is the best protein tracker app in 2026? We compared four nutrition apps on custom protein targets, database accuracy, nutrient depth, and what stays free. One of them tracks protein and amino acids at no cost.

MyNetDiary is the best app to track protein intake for most people in 2026. Protein and amino acid tracking, a custom protein target in grams and a barcode scanner are free, with no ads, on a staff-verified database of 2M+ foods built on research-grade sources.

The best protein tracking app comes down to three things: who sets the target, how the database is verified, and what you get before you pay. We make MyNetDiary, so read our pick with that in mind. I checked features and prices in October 2026 on each app's App Store listing and website, used our January 2026 logging test and an independent 2026 accuracy study, and I say where Cronometer, MacroFactor and MyFitnessPal beat us.

Why Track Your Protein Intake?

Protein is the number most people guess until they log it. The 2025-2030 Dietary Guidelines for Americans, released January 7, 2026, tell adults to prioritize protein at every meal and set 1.2 to 1.6 grams per kilogram of body weight per day, above the 0.8 g/kg Recommended Dietary Allowance.

Weight loss in a calorie deficit can include muscle loss, and adequate protein with strength training helps preserve muscle mass, including during GLP-1 treatment (2025 joint advisory of four medical and nutrition societies). Per-meal protein matters too, so the diary should show protein by meal as well as by day. Logging shows whether your usual meals and protein sources reach the target.

What to Look for in a Protein Tracker App

Some apps only tally protein; this comparison covers macro-tracking apps that calculate it from the foods you log, as a calorie counter or for protein alone. Five things to compare:

1. Can you set a protein target in grams, and is it free? A percentage target moves with your calories. A gram target stays put.
2. Are user-submitted foods reviewed before they go public? MyNetDiary's staff check each submission before it is published (our process). MyFitnessPal's database is mostly user-submitted.
3. How complete is each entry? Nutrient completeness, the nutrient fields actually populated for a food, decides whether amino acids and micronutrients come with the protein. A maximum count is only the ceiling.
4. How much work does regular logging take? In our seven-day test of 127 identical entries, MyNetDiary needed 711 actions, MacroFactor 877, Cronometer 1,003 and MyFitnessPal 1,035 (how we counted).
5. What stays free, and do ads come with it? The table answers that tier by tier.

Quick Comparison: Best Protein Tracker Apps

The four best apps for tracking protein side by side, all full nutrition apps: features and prices as checked in October 2026, logging speed from our January 2026 test.

App	Best for	Custom protein target	Food database	Nutrients tracked	Free tier	Price
MyNetDiary (our pick)	Protein tracking overall	Grams or % of calories, free	2M+ staff-verified foods; USDA and NCC research-grade sources	up to 108	Gram target, scanner, voice logging; no ads, no account to start	Free; Premium $59.99/yr
Cronometer	Device integrations and custom charts (Gold)	Grams, free	1.2M verified foods	up to 95	Gram target, scanner; ads	Free with ads; Gold $59.99/yr
MacroFactor	Athletes and serious macro trackers	Custom in Manual and Collaborative; body-weight-based in Coached	1.36M foods; USDA, NCC and Open Food Facts; community review of submissions	about 57	None	$71.99/yr
MyFitnessPal	Large food database	Percentages free; grams with Premium	20.5M foods; company-reviewed plus public user submissions	21	Percentage targets; scanner Premium; ads	Free with ads; Premium $79.99/yr

The Best Apps to Track Protein Intake

These four nutrition trackers differ in what they give free, how they log, and what the paid tiers add. Each profile below was checked in October 2026.

1. MyNetDiary: Best Overall for Protein Tracking

Best for: most people. It is the best app for tracking protein at no cost, with a gram target you set yourself.

• How do you set the target? Open My Weight Goal & Plan screen, go to Macros tab, type protein in grams or as a percentage of calories, and the food diary shows per-meal protein and the day's total against it.
• How fast is logging? Verified foods, free barcode scanning and basic voice logging. In our seven-day test MyNetDiary needed the fewest actions of the four.
• What comes with the protein number? Full macro tracking, amino acids and up to 108 nutrients per entry, at no cost, where the data exists. Premium adds a High-Protein diet plan that sets protein from your weight, high-protein menus for meal planning, Meal Scan for AI photo logging, and MyNetDiary's GLP-1 Companion with protein-first planning.

Why it stands out: accurate nutrition tracking for free, with a custom protein target, barcode scanning and an ad-free experience on the free tier.

Price: free, with Premium at $59.99 a year ($8.99 monthly) and Premium Plus at $99.99 a year.

2. Cronometer: Best for Device Integrations and Multivariable Charting

Best for: people who chart protein against device data from a WHOOP, a Dexcom or a sleep tracker.

• A gram target is free. The custom charts that plot protein against another variable need Gold.
• 1.2M verified foods and up to 95 nutrients, amino acids included.
• The free tier carries ads, and voice and photo logging need Gold. Third of the four in our seven-day test.

Why it stands out: protein charted against a CGM or a sleep tracker is something Cronometer does and we do not (Cronometer vs. MyNetDiary).

Price: Gold $59.99 a year ($10.99 monthly), free tier with ads.

3. MacroFactor: Best for Athletes and Serious Macro Trackers

Best for: athletes and lifters focused on muscle building who want to run the plan themselves.

• Coached sets and adjusts targets for fat loss or muscle gain, Collaborative adjusts calories while you set the macros, and Manual leaves the targets to you. In Coached, protein follows your body weight at weekly check-ins.
• Weekly check-ins adjust calories from its expenditure estimate, with a chart that explains each change. Second fastest of the four in our seven-day test.
• About 57 nutrients, 1.36M foods including Open Food Facts entries, and no free tier.

Why it stands out: more ways to run the plan than we offer. MyNetDiary's Advanced Autopilot (Premium) also estimates your actual energy expenditure from logged food, logged exercise and Trending Weight and updates targets as the estimate changes. Which app estimates expenditure better, we did not test.

Price: $71.99 a year ($11.99 monthly), no free tier.

4. MyFitnessPal: Best for a Large Food Database

Best for: the largest database of these four.

• 20.5M foods, company-reviewed plus public user submissions, and the broadest integration list, 40+, Apple Health included.
• 21 nutrients. Gram targets and the barcode scanner need Premium (free users set percentages in 5% steps), and the free tier carries ads.
• Slowest of the four in our seven-day test.

Why it stands out: its database is about ten times the size of ours, and you will almost always find the food (MyFitnessPal vs. MyNetDiary).

Price: Premium $79.99 a year ($19.99 monthly), free tier with ads.

Start Hitting Your Protein Goals Today

For most people the best protein tracker app in 2026 lets you set a gram target, scan a barcode and see the whole nutrient picture without paying. MyFitnessPal keeps gram-based targets behind Premium at $79.99 a year. In MyNetDiary, setting that target is free, with no ads.

Start logging protein free in MyNetDiary. Set your protein target and log your first meal. No ads, no account needed to start, and no judgment when you miss a day.

Frequently Asked Questions

What is the best app to track protein intake?

My answer is MyNetDiary: a gram target, barcode scanning and up to 108 nutrients at no cost, with no ads, on a verified database. Cronometer if you chart protein against device data, MacroFactor if you run an athlete's plan, MyFitnessPal if database size matters most.

What is the best free protein tracker app?

MyNetDiary is our pick. A protein target in grams, barcode scanning, calorie tracking and basic voice logging are free, with no ads and no account required to start. It is the best protein tracker app free of ads among these four: Cronometer and MyFitnessPal show ads in their free tiers, and MacroFactor has no free tier.

How much protein do I actually need per day?

The Recommended Dietary Allowance is 0.8 g per kilogram of body weight (0.36 g per pound). The 2025-2030 Dietary Guidelines for Americans set an adult target of 1.2 to 1.6 g/kg (0.55 to 0.73 g per pound), adjusted to calorie needs: about 98 to 131 g a day at 180 lb. Your doctor or dietitian can help set a target for your weight, muscle mass and activity level, and suggest protein sources such as lean meats (the benefits of eating protein).

Are protein tracking apps accurate?

Accuracy follows the database. MyNetDiary and Cronometer draw on the same USDA and NCC research-grade sources, and MyNetDiary's 2M+ staff-verified foods make highly accurate nutrition tracking possible for packaged items. In a 2026 study of 13 apps (Bayram and Ozturkcan), MyNetDiary's three-day average protein estimate for standardized menus came closest to the reference, 1.6% high. Manual logging only, and MacroFactor was not included (our research page).

Can I set a custom protein target in MyNetDiary?

Yes. Enter your personal goal in grams or as a percentage of calories in your nutrient targets, free, and the diary tracks you against it, one reason MyNetDiary is our pick for the best protein tracker app. Premium adds a High-Protein diet plan and MyNetDiary's GLP-1 Companion, which plans protein first for weight loss on GLP-1 medication.

Disclosure: MyNetDiary publishes this article and makes the app we recommend in it. Features and prices were checked in October 2026 and can change; each app's own pricing page has the current terms.

The information provided here does not constitute medical advice. If you are seeking medical advice, please visit your healthcare provider or medical professional.

All product names, logos, and brands are the property of their respective owners.

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