# Best Protein Tracker Apps in 2026, for Every Diet

> The best protein tracker apps in October 2026 for meat eaters, vegetarians and vegans. Callie, Cronometer, MacroFactor, MyFitnessPal and Protein Pal compared on logging speed, protein targets and US prices, plus a USDA protein-per-100-kcal table.

Canonical: https://www.mycallie.app/en/blog/best-protein-tracker-app
Published: 2026-10-20 · Updated: 2026-10-20
Author: Md Sadab Wasim · Source: https://www.mycallie.app

## Key takeaways

- The best protein tracker is the one you will actually log with every day. Fast, accurate logging of what you eat and a daily target you can see matter more than whether your protein comes from chicken, paneer or tofu.
- Callie is a strong pick for fast logging: photo, voice and text, a review screen before anything is saved, and a daily protein target with progress, for $34.99 a year in the US. It does not track micronutrients or amino acids.
- Cronometer is the pick for amino acids, leucine and micronutrients. It also has a real free tier with barcode scanning and up to 84 nutrients. Gold costs $59.99 a year.
- Most active adults need 1.4–2.0 g of protein per kg of body weight a day (ISSN, 2017). In a 49-trial meta-analysis, muscle gains levelled off at about 1.6 g/kg. The RDA of 0.8 g/kg is a minimum.
- In USDA data, shrimp, tuna, cod, turkey breast and egg whites give 21–24 g of protein per 100 kcal. Chicken breast gives 18.8 g, firm tofu 12.0 g, lentils 7.8 g and paneer 5.3 g.

Callie is our app. It comes first in the table below, and each of the other apps gets the job it does best. We checked every price and feature on vendor sites and US App Store pages on October 20, 2026. Sources are at the bottom.

## The 30-second answer

**The best protein tracker logs what you actually eat quickly enough that you keep doing it, and keeps your daily protein target where you can see it.** That has nothing to do with whether the protein comes from chicken, paneer or tofu. Most active adults need [1.4–2.0 g per kg a day](https://pmc.ncbi.nlm.nih.gov/articles/PMC5477153/). Picks by need:

- **Fast photo, voice and text logging with a protein target: [Callie: AI Calorie Tracker](/pricing).** A review screen comes up before anything is logged. $34.99 a year.
- **Amino acids, leucine and micronutrients, plus a free tier: Cronometer.** Gold is $59.99 a year.
- **Adaptive coaching for lifters: MacroFactor.** $71.99 a year.
- **The biggest database: MyFitnessPal.** It has over 20.5 million foods, but barcode scanning is Premium ($79.99 a year).
- **Just one protein number: Protein Pal.** It is free for manual logging.

## Protein tracker apps compared

All five apps set a protein target. They differ on logging speed, whether you can check an estimate before it is saved, and detail beyond grams of protein.

| Feature | Callie | Cronometer | MacroFactor | MyFitnessPal | Protein Pal |
|---|---|---|---|---|---|
| Photo logging | Yes | Gold | Yes | Premium | Pro |
| Review before a photo is logged | Yes | Gold | Yes | Not confirmed | Not confirmed |
| Voice logging | Yes | Gold | Dictation in Describe | Premium | Not listed |
| Barcode scanner | Yes | Free | Yes | Premium | Pro |
| Daily protein target | With progress | Yes | Yes | Yes | Yes |
| Amino acid and leucine tracking | No | Yes | Not listed | Not listed | No |
| Micronutrients | No | Up to 84 free | Yes | Basic set | No |
| Adaptive targets | Every 2 weeks | No | Weekly | No | No |
| App languages | 6 | English | English, Japanese | 20 | English, German |
| US yearly price | $34.99 | Free tier; Gold $59.99 | $71.99 | $79.99 (Premium) | Free core; Pro up to $35.99 listed |

_Vendor sites and US App Store listings, checked October 20, 2026. 'Not confirmed' and 'Not listed' mean we could not find it on the vendor's own pages. Protein Pal's listing does not label its billing periods. Prices change; confirm in-app before subscribing._

## How much protein you actually need

**Most active adults need 1.4–2.0 g of protein per kg of body weight a day. The 0.8 g/kg RDA is a floor for sedentary adults, not a target.**

The US [RDA of 0.8 g/kg](https://nap.nationalacademies.org/catalog/10490) is set to prevent deficiency. The International Society of Sports Nutrition's 2017 position stand says "an overall daily protein intake in the range of 1.4–2.0 g protein/kg body weight/day (g/kg/d) is sufficient for most exercising individuals" ([Jäger et al., 2017](https://pmc.ncbi.nlm.nih.gov/articles/PMC5477153/)).

The best data on where the benefit tops out comes from a [2018 meta-analysis of 49 trials with 1,863 participants](https://pubmed.ncbi.nlm.nih.gov/28698222/). Protein supplements added 0.30 kg of fat-free mass and 2.49 kg to one-rep-max strength. The authors concluded that "protein intakes at amounts greater than ~1.6 g/kg/day do not further contribute RET-induced gains in FFM."

In a calorie deficit the number rises. [Helms et al. (2014)](https://pubmed.ncbi.nlm.nih.gov/24092765/) put lean, resistance-trained athletes at 2.3–3.1 g per kg of *fat-free* mass, rising with leanness and the size of the deficit. That review rests on only 6 studies of lean, trained lifters, so don't apply it to everyone.

At 1.4–2.0 g/kg, a 75 kg adult needs 105–150 g a day. Our [protein calculator](/blog/protein-calculator) does the math for your goal.

## Protein per 100 kcal: meat, dairy, eggs and plants

**Per 100 kcal, shrimp, tuna, cod, turkey breast and egg whites give 21–24 g of protein, chicken breast 18.8 g, firm tofu 12.0 g, lentils 7.8 g and almonds 3.7 g.**

In a deficit, protein per 100 kcal decides whether you hit your target. We pulled every value below from [USDA FoodData Central](https://fdc.nal.usda.gov/) on October 20, 2026, per 100 g as eaten. Paneer comes from USDA's FNDDS survey database, because SR Legacy has no paneer entry. Each ID opens at `fdc.nal.usda.gov/food-details/ID/nutrients`.

| Food | Type | USDA FDC ID | Protein per 100 g | kcal per 100 g | Protein per 100 kcal | kcal for 30 g protein |
|---|---|---|---|---|---|---|
| Soy protein isolate | Plant | 174276 | 88.3 g | 335 | **26.4 g** | 114 |
| Shrimp, cooked | Meat & fish | 175180 | 24.0 g | 99 | **24.2 g** | 124 |
| Whey-based protein powder | Supplement | 173180 | 78.1 g | 352 | **22.2 g** | 135 |
| Tuna, light, canned in water, drained | Meat & fish | 171986 | 25.5 g | 116 | **22.0 g** | 136 |
| Cod, Atlantic, cooked | Meat & fish | 171956 | 22.8 g | 105 | **21.7 g** | 138 |
| Turkey breast, roasted | Meat & fish | 174516 | 29.5 g | 136 | **21.7 g** | 138 |
| Egg white | Eggs | 172183 | 10.9 g | 52 | **21.0 g** | 143 |
| Vital wheat gluten (seitan base) | Plant | 168147 | 75.2 g | 370 | **20.3 g** | 148 |
| Chicken breast, roasted | Meat & fish | 171477 | 31.0 g | 165 | **18.8 g** | 160 |
| Pork tenderloin, lean, roasted | Meat & fish | 168250 | 26.2 g | 143 | **18.3 g** | 164 |
| Greek yogurt, nonfat, plain | Dairy | 170894 | 10.2 g | 59 | **17.3 g** | 174 |
| Cottage cheese, 1% | Dairy | 173417 | 12.4 g | 72 | **17.2 g** | 174 |
| Salmon, sockeye, cooked | Meat & fish | 173692 | 26.5 g | 156 | **17.0 g** | 177 |
| Top sirloin, lean, broiled | Meat & fish | 168634 | 30.6 g | 183 | **16.7 g** | 179 |
| Ground beef 95% lean, pan-broiled | Meat & fish | 171792 | 25.8 g | 164 | **15.7 g** | 191 |
| Chicken thigh, roasted | Meat & fish | 172388 | 24.8 g | 179 | **13.9 g** | 217 |
| Tofu, firm | Plant | 172475 | 17.3 g | 144 | **12.0 g** | 250 |
| Salmon, Atlantic, farmed, cooked | Meat & fish | 175168 | 22.1 g | 206 | **10.7 g** | 280 |
| Tempeh | Plant | 174272 | 20.3 g | 192 | **10.6 g** | 284 |
| Skim milk | Dairy | 171269 | 3.4 g | 34 | **9.9 g** | 303 |
| Edamame | Plant | 168411 | 11.9 g | 121 | **9.8 g** | 305 |
| Mozzarella, part-skim | Dairy | 170847 | 24.3 g | 254 | **9.6 g** | 314 |
| Egg, whole, hard-boiled | Eggs | 173424 | 12.6 g | 155 | **8.1 g** | 369 |
| Lentils, boiled | Plant | 172421 | 9.0 g | 116 | **7.8 g** | 386 |
| Black beans, boiled | Plant | 175237 | 8.9 g | 132 | **6.7 g** | 447 |
| Cheddar | Dairy | 170899 | 24.2 g | 410 | **5.9 g** | 508 |
| Chickpeas, boiled | Plant | 173757 | 8.9 g | 164 | **5.4 g** | 555 |
| Paneer | Dairy | 2705740 | 15.9 g | 299 | **5.3 g** | 566 |
| Whole milk | Dairy | 171265 | 3.2 g | 61 | **5.2 g** | 581 |
| Peanuts, dry-roasted | Plant | 173806 | 24.4 g | 587 | **4.2 g** | 722 |
| Almonds | Plant | 170567 | 21.2 g | 579 | **3.7 g** | 819 |
| Quinoa, cooked | Plant | 168917 | 4.4 g | 120 | **3.7 g** | 818 |

Fat content matters more than animal versus plant. Farmed salmon and firm tofu land within 1.3 g of each other, and cheddar and paneer sit below lentils. The cut matters too: chicken thigh gives 26% less protein per 100 kcal than breast, so logging just "chicken" can be off by that much. Check labels on packaged foods and protein powder.

## Does the protein source matter?

**For hitting a daily target, barely. Soy roughly matches milk for muscle. Other plant proteins come out a little behind animal protein for muscle mass in adults under 60, and strength results are the same.**

Protein quality is scored by DIAAS. [Herreman et al. (2020)](https://pmc.ncbi.nlm.nih.gov/articles/PMC7590266/) rated pork, casein, egg and potato protein "excellent" (DIAAS of 100 or more), whey and soy "high quality" (75 or more), and pea, rice, oat, wheat and hemp below 75. Scores vary a lot between studies: different references gave whey anywhere from 78 to 88. Leucine content also varies. In [Gorissen et al. (2018)](https://pmc.ncbi.nlm.nih.gov/articles/PMC6245118/), leucine made up 9.0% of milk protein and 7.0% of egg protein, against 5.1% (hemp) to 13.5% (corn) for plant isolates.

Trials matter more than scores. A [2025 Nutrition Reviews meta-analysis](https://pubmed.ncbi.nlm.nih.gov/39813010/) of 43 trials, 30 of which were pooled, found a small edge for animal protein on muscle mass (SMD −0.20), seen only in under-60s. Soy vs milk showed no difference (SMD −0.02, 17 trials). Non-soy plant proteins trailed (SMD −0.58, 5 trials). Strength did not differ across 14 trials. The authors wrote: "Animal protein may have a small beneficial effect over non-soy plant protein for muscle mass; however, research into a wider range of plant proteins and diets is needed." In a [12-week trial](https://pubmed.ncbi.nlm.nih.gov/33599941/) where protein was matched at 1.6 g/kg, vegans and omnivores both gained 1.2 kg of leg lean mass.

For more depth, read our [vegan protein tracker guide](/blog/best-vegan-protein-tracker-app) and [vegetarian protein tracker guide](/blog/best-vegetarian-protein-tracker-app).

## What makes a protein tracker good

**Five things matter: logging speed, per-meal protein, a visible daily target, a reason to keep going, and estimates you can correct before they are saved.**

**Speed beats database size if you log every day.** A 20-million-item database doesn't help on days you skip logging because search is slow. A ten-second photo or voice log still happens on a busy Tuesday.

**Per-meal protein.** The ISSN suggests 0.25 g/kg or 20–40 g per meal, with 700–3,000 mg of leucine, "evenly distributed, every 3–4 h" ([Jäger et al., 2017](https://pmc.ncbi.nlm.nih.gov/articles/PMC5477153/)). [Schoenfeld and Aragon (2018)](https://pubmed.ncbi.nlm.nih.gov/29497353/) suggest 0.4 g/kg across at least four meals. Older men need more per meal: muscle protein synthesis maxed out at 0.40 g/kg, against 0.24 g/kg in young men ([Moore et al., 2015](https://pubmed.ncbi.nlm.nih.gov/25056502/)). A good app shows each meal's protein, not just the day's total.

**A visible target.** You should see protein grams against your goal on the main screen, not three taps away.

**Streaks.** A daily streak gives you a reason to log on the days you'd skip. See [calorie trackers for streaks and habits](/blog/best-calorie-tracker-for-streaks-and-habits).

**Correctable estimates.** Photo estimates can miss. You want to fix the portion before it goes into your total, not after.

## The protein tracker apps, reviewed

### Callie: best for fast logging with a daily protein target

**Best for:** people who want to log every meal in seconds and see their protein for the day without opening a database.

Callie logs by photo, voice or text. A photo scan opens a review screen with the foods, portions, calories and macros, including that meal's protein, and nothing is saved until you confirm. Callie shows a daily protein target with progress, alongside your calories and macros. Portion estimates use the depth and camera metadata in the original photo. The barcode and menu scanner cover packaged and restaurant food. A GitHub-style streak dashboard and a home screen widget keep you logging, and cheat days you schedule ahead don't break the streak. The AI coach answers in any language, and if you tell it you're vegan or vegetarian, it adapts its suggestions.

In [our own 20-meal test](/compare/callie-vs-cal-ai), Callie averaged 13% error against Cal AI's 17%. That was our test, not an independent one. Pricing is 3 AI logs to try it, then $34.99 a year, $14.99 a month or $4.99 a week in the US ([pricing](/pricing)). That is less than half of MyFitnessPal Premium ($79.99) or MacroFactor ($71.99).

**Skip it if:** you want micronutrients such as B12, iron or calcium, or amino acids such as leucine; Callie tracks neither. And there is no free tier.

### Cronometer: best for amino acids, leucine and micronutrients

**Best for:** people who want more than grams of protein, including vegans watching lysine and B12.

[Cronometer says](https://cronometer.com/blog/everything-you-need-to-know-about-eating-plant-based-part-1/) "you can track lysine intake (and all essential amino acids)", and that includes leucine. A Cronometer moderator [notes](https://forums.cronometer.com/discussion/comment/9364) that amino acid data comes mostly from NCCDB and USDA entries, so choose those entries when you log. The [free Basic plan](https://cronometer.com/gold/index.html) includes custom macro and micronutrient targets, a barcode scanner, up to 84 nutrients and over 1 million lab-analyzed or verified foods, with ads. Gold adds photo logging (since [September 2025](https://www.prnewswire.com/news-releases/cronometer-launches-premium-photo-logging-fast-verified-nutrition-tracking-for-real-life-302549752.html), with a review step) and voice logging, for $59.99 a year or $10.99 a month.

**Skip it if:** detailed data overwhelms you, or you want photo logging without paying.

### MacroFactor: best adaptive coaching for lifters

**Best for:** people who lift, who want targets that adjust each week, and who will log consistently.

MacroFactor's [App Store listing](https://apps.apple.com/us/app/macrofactor-macro-tracker/id1553503471) describes a "dynamic algorithm to adapt to changes in your metabolism" that updates calorie and macro targets every week. AI photo results open in an editable Plate view, and nothing is saved until you tap Log Foods ([help center](https://help.macrofactorapp.com/en/articles/258-ai-food-logging)). The Describe feature takes typed text or keyboard dictation ([help center](https://help.macrofactorapp.com/en/articles/216-log-foods-with-describe)). After a 7-day trial it costs $71.99 a year or $11.99 a month.

**Skip it if:** you want a free tier (there isn't one), or you need an app in a language other than English or Japanese.

### MyFitnessPal: best food database

**Best for:** people who eat many branded and chain-restaurant foods.

MyFitnessPal's [listing](https://apps.apple.com/us/app/myfitnesspal-calorie-counter/id341232718) says it has over 20.5 million foods. Free logging includes a macro breakdown with a protein target. Barcode scanning, Meal Scan, voice logging and custom macro goals are Premium, and the barcode scanner has been Premium since October 2022. Premium costs $79.99 a year or $19.99 a month.

**Skip it if:** you want barcode scanning without paying, or you're avoiding Cal AI's owner. MyFitnessPal [acquired Cal AI](https://techcrunch.com/2026/03/02/myfitnesspal-has-acquired-cal-ai-the-viral-calorie-app-built-by-teens/) in a deal announced in March 2026.

### Protein Pal: best for tracking only protein

**Best for:** people who just want to hit one number and don't care about calories.

[Protein Pal](https://www.proteinpalapp.com/) calculates a daily protein goal from a few questions. The free version includes the goal, manual logging, streaks and stats. Pro adds barcode scanning, AI photo scanning, a widget and optional calorie tracking. On the [US App Store](https://apps.apple.com/us/app/protein-tracker-protein-pal/id1541193285), Pro purchases range from $3.99 to $35.99, without billing periods labelled. The developer is Ten Labs Ltd.

**Skip it if:** you also need to manage calories or macros in a deficit. Its food search covers English-speaking regions only.

## For vegans and vegetarians: the short version

**Logging tofu, dal or paneer works the same as logging chicken. What changes is the protein you get per 100 kcal, and how much soy versus other plant protein you eat.**

Vegans get the most protein per calorie from soy isolate, seitan, tofu and tempeh (10.6–26.4 g per 100 kcal). Lentils and chickpeas give 5.4–7.8 g. For vegetarians, nonfat Greek yogurt and cottage cheese give about 17 g per 100 kcal, far above paneer's 5.3 g. If you want lysine, leucine and B12, Cronometer is the honest pick. Callie's BMI-matched daily diet plans include vegan and vegetarian plans (added October 2026), and its AI coach adapts its suggestions when you tell it your diet. The full guides: [best vegan protein tracker apps](/blog/best-vegan-protein-tracker-app) and [best vegetarian protein tracker apps](/blog/best-vegetarian-protein-tracker-app). For a week of high-protein meals, see our [high protein meal plan](/blog/high-protein-meal-plan).

This is general information, not medical advice. If you have kidney disease, are pregnant, or take a GLP-1 medication, get your protein target from your doctor or a registered dietitian.

## When Callie isn't the right pick

**Callie is the wrong choice if you need micronutrients, amino acids, a free tier or week-by-week coaching for lifting.**

- **Micronutrients or leucine:** Cronometer. Callie tracks neither.
- **A free plan:** Cronometer's Basic plan or Protein Pal's free version. Callie gives you 3 AI logs, then it's a subscription.
- **Serious lifting with weekly adjustments:** MacroFactor. Callie re-tunes your calorie target every 2 weeks, while MacroFactor adjusts every week and is built around training.
- **Lots of branded or restaurant food:** MyFitnessPal's 20.5 million foods.

For a head-to-head, see [Callie vs Cronometer](/compare/callie-vs-cronometer) and [Callie vs MacroFactor](/compare/callie-vs-macrofactor).

## Related reading

- [Do you need a food scale with an AI tracker?](/blog/do-you-need-a-food-scale-with-ai-tracker)
- [Cronometer vs MyFitnessPal](/blog/cronometer-vs-myfitnesspal)

## Sources

1. Jäger R, et al. (2017). "International Society of Sports Nutrition Position Stand: protein and exercise." JISSN 14:20. https://pmc.ncbi.nlm.nih.gov/articles/PMC5477153/
2. Morton RW, et al. (2018). "A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults." Br J Sports Med 52:376–384. https://pubmed.ncbi.nlm.nih.gov/28698222/
3. Helms ER, et al. (2014). "A systematic review of dietary protein during caloric restriction in resistance trained lean athletes." IJSNEM 24(2):127–138. https://pubmed.ncbi.nlm.nih.gov/24092765/
4. National Academies (2005). "Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids." https://nap.nationalacademies.org/catalog/10490
5. Schoenfeld BJ, Aragon AA (2018). "How much protein can the body use in a single meal for muscle-building?" JISSN 15:10. https://pubmed.ncbi.nlm.nih.gov/29497353/
6. Moore DR, et al. (2015). "Protein ingestion to stimulate myofibrillar protein synthesis requires greater relative protein intakes in healthy older versus younger men." J Gerontol A 70(1):57–62. https://pubmed.ncbi.nlm.nih.gov/25056502/
7. Reid-McCann RJ, et al. (2025). "Effect of Plant Versus Animal Protein on Muscle Mass, Strength, Physical Performance, and Sarcopenia." Nutrition Reviews 83(7):e1581–e1603. https://pubmed.ncbi.nlm.nih.gov/39813010/
8. Hevia-Larraín V, et al. (2021). "High-Protein Plant-Based Diet Versus a Protein-Matched Omnivorous Diet to Support Resistance Training Adaptations." Sports Medicine 51(6):1317–1330. https://pubmed.ncbi.nlm.nih.gov/33599941/
9. Herreman L, et al. (2020). "Comprehensive overview of the quality of plant- and animal-sourced proteins based on the digestible indispensable amino acid score." Food Sci Nutr 8:5379–5391. https://pmc.ncbi.nlm.nih.gov/articles/PMC7590266/
10. Gorissen SHM, et al. (2018). "Protein content and amino acid composition of commercially available plant-based protein isolates." Amino Acids 50:1685–1695. https://pmc.ncbi.nlm.nih.gov/articles/PMC6245118/
11. USDA FoodData Central, SR Legacy and FNDDS (accessed October 20, 2026). https://fdc.nal.usda.gov/
12. Cronometer Gold and Basic plans (accessed October 20, 2026). https://cronometer.com/gold/index.html
13. Cronometer blog. "Everything You Need To Know About Eating Plant-based: Part 1." https://cronometer.com/blog/everything-you-need-to-know-about-eating-plant-based-part-1/
14. Cronometer Community forum, leucine data sources. https://forums.cronometer.com/discussion/comment/9364
15. Cronometer press release (September 8, 2025). "Cronometer Launches Premium Photo Logging." https://www.prnewswire.com/news-releases/cronometer-launches-premium-photo-logging-fast-verified-nutrition-tracking-for-real-life-302549752.html
16. Cronometer App Store listing (accessed October 20, 2026). https://apps.apple.com/us/app/cronometer-calorie-counter/id1145935738
17. MacroFactor App Store listing (accessed October 20, 2026). https://apps.apple.com/us/app/macrofactor-macro-tracker/id1553503471
18. MacroFactor Help Center. "AI Food Logging" and "Log Foods with Describe" (accessed October 20, 2026). https://help.macrofactorapp.com/en/articles/258-ai-food-logging and https://help.macrofactorapp.com/en/articles/216-log-foods-with-describe
19. MyFitnessPal App Store listing (accessed October 20, 2026). https://apps.apple.com/us/app/myfitnesspal-calorie-counter/id341232718
20. TechCrunch (March 2, 2026). "MyFitnessPal has acquired Cal AI, the viral calorie app built by teens." https://techcrunch.com/2026/03/02/myfitnesspal-has-acquired-cal-ai-the-viral-calorie-app-built-by-teens/
21. Protein Pal website (accessed October 20, 2026). https://www.proteinpalapp.com/
22. Protein Pal App Store listing (accessed October 20, 2026). https://apps.apple.com/us/app/protein-tracker-protein-pal/id1541193285
23. Callie internal 20-meal kitchen-scale benchmark (May 2026). Methodology at https://www.mycallie.app/en/compare/callie-vs-cal-ai

## Frequently asked questions

**Q: What is the best app to track protein?**
A: It depends on what you need. For fast daily logging with a protein target always in view, Callie logs by photo, voice or text and shows each meal's protein on a review screen before saving, for $34.99 a year. For amino acids, leucine and micronutrients, pick Cronometer. Lifters who want targets that adjust each week should pick MacroFactor. If you want the biggest food database, pick MyFitnessPal. If you only care about one protein number, try Protein Pal.

**Q: Is there a free protein tracker?**
A: Yes. Cronometer's free Basic plan includes custom macro targets, a barcode scanner and up to 84 nutrients, with ads. Protein Pal's free version covers a daily protein goal, manual logging, streaks and stats. MyFitnessPal lets you log for free, but barcode scanning is Premium. Callie isn't free: you get 3 AI logs to try it, then it costs $34.99 a year in the US.

**Q: How do I track protein without weighing food?**
A: Log by photo or voice in an app that shows you the estimate before saving it, then correct the portion if it looks wrong. Use the label for anything packaged. To calibrate your eye, weigh your most common protein foods once, such as a chicken breast, a pot of yogurt or a block of tofu. After that, estimates from a photo or a spoken description are usually close enough to hit a daily target.

**Q: How much protein should I eat a day?**
A: The ISSN puts most exercising adults at 1.4–2.0 g per kg of body weight a day. In a 2018 meta-analysis of 49 trials, extra protein stopped adding muscle at about 1.6 g/kg. For a 75 kg adult that is 105–150 g a day. The RDA of 0.8 g/kg prevents deficiency in sedentary adults and is not a target for building or keeping muscle.

**Q: Can a protein tracker track leucine?**
A: Cronometer can. It tracks all the essential amino acids, including leucine and lysine, for foods from its NCCDB and USDA data sources. Callie, Protein Pal and MyFitnessPal do not list amino acid tracking. The ISSN suggests 700–3,000 mg of leucine per protein dose.

**Q: Which protein tracker is best for vegans or vegetarians?**
A: Any good tracker handles tofu, lentils and paneer as easily as chicken. Callie's BMI-matched daily diet plans include vegan and vegetarian plans, and its AI coach adjusts its suggestions if you tell it your diet. Cronometer is the pick if you also want B12, iron, lysine and leucine. We cover each diet in our vegan and vegetarian protein tracker guides.