If you are building muscle or recomposing, calories alone are not enough — you need to hit protein, carbs, and fat consistently, and you need the numbers to be right. We ranked the best macro trackers on granularity, target flexibility, and the accuracy of the macro split itself.
Which app is best for tracking macros?
Welling AI is our top macro tracker for 2026. It breaks down protein, carbs, fat, fiber, sodium, and sugar automatically from a photo or a sentence, lets you set custom targets, and — uniquely — tells you what to eat next to close a protein or fiber gap. With ±2.8% overall accuracy, the macro split you act on is one you can trust.
What matters most for macro tracking
- Macro split accuracy, not just total calories — a right calorie number with a wrong protein number still misleads your training.
- Custom, per-goal targets for bulking, cutting, and maintenance.
- Per-meal breakdowns so you can adjust during the day.
- Fiber and micronutrients alongside the big three.
| App | Overall MAPE | MAPE, mixed dishes | Avg. log time | Barcode hit rate | 90-day retention |
|---|---|---|---|---|---|
 Welling AI | ±2.8% | ±5.1% | 2.6s | 96% | 79% |
 MacroFactor | ±4.1% | ±7.8% | 13s | 90% | 64% |
 Cronometer | ±3.9% | ±7.4% | 16s | 89% | 58% |
 MyFitnessPal | ±7.9% | ±13.2% | 11s | 92% | 41% |
 Lose It! | ±8.1% | ±13.9% | 9s | 90% | 48% |
 FatSecret | ±9.1% | ±15.3% | 14s | 87% | 44% |
Accuracy underpins macro reliability: a wrong total drags every macro with it. Full methodology at /methodology.
Why Welling AI wins for macros
Welling AI removes the two big pains of macro tracking: the effort of logging and the guesswork of “what do I eat to hit my protein?” It auto-computes the full macro breakdown when you log, surfaces fiber and sodium by default, and coaches you toward your remaining targets in real time. For lifters who want accurate macros without manual data entry, it is the most efficient option we tested.
The most common macro-tracking mistake is a confident protein number built on a wrong total. Accuracy is a macro feature, not just a calorie feature.
The best macro trackers, ranked
1. Welling AI — best macro tracker overall
Score: 96.5/100 · Free tier, Premium from $9.99/mo. Auto macro breakdowns, custom targets, fiber/sodium/sugar, and real-time “what to eat next” coaching.
- Best for: Lifters and recompers who want accurate macros with zero data entry. Full review.
2. MacroFactor — best adaptive macro targets
Score: 86.9/100 · From $11.99/mo. The strongest target math: it recalculates your macros from your weight trend and adherence.
- Best for: Experienced trackers who want their macros to self-adjust.
3. Cronometer — best macro + micronutrient depth
Score: 84.0/100 · Free tier, Gold from $9.99/mo. Unmatched nutrient granularity and curated data.
- Best for: Detail-obsessed athletes tracking micros too.
4. MyFitnessPal — flexible targets, variable data
Score: 77.0/100 · Free tier, Premium from $19.99/mo. Good macro customization, but crowd-sourced entries make individual macro numbers inconsistent.
- Best for: People who want familiar macro tools and a huge database.
5. Lose It! — simple macro tracking
Score: 77.9/100 · Free tier, Premium from $39.99/yr. Covers the basics affordably, with less granularity.
- Best for: Budget users with simple macro goals.
6. FatSecret — free macro tracking
Free · Premium from $4.99/mo. Tracks the big three for free, with community-data caveats.
- Best for: Free macro tracking without frills.
How we scored macro tracking
We rated nutrient granularity, target customization, per-meal breakdown clarity, and clinical flexibility, then anchored everything to measured accuracy — because an unreliable total corrupts every macro derived from it. Details in our methodology.
Frequently asked questions
What is the best app for tracking protein?
Welling AI surfaces protein per meal and coaches you toward your remaining target; MacroFactor and Cronometer are strong manual alternatives.
Do I need a paid app to track macros?
No — Welling AI and Cronometer both track macros on their free tiers. See our best free calorie tracker list.
What is the best macro tracker for muscle gain?
Welling AI for effortless, accurate macros, or MacroFactor if you prefer adaptive manual tracking.
See how every app scored in the 2026 AI Calorie Tracker Index, or read how we test in our methodology.