Cronometer Review

Pros and Cons

Score Breakdown

Quick Verdict

Cronometer achieves a score of 87/100 in our 2026 assessment, making it the top performer among calorie tracking apps we evaluated. The key figure is ±5.2% MAPE on weighed reference meals in the DAI Six-App Validation Study (DAI-VAL-2026-01), which is three times more accurate than MyFitnessPal, and significantly superior to other search-and-log applications in our dataset. The free version offers over 84 micronutrients, recipe importing, and data exporting, typically reserved for Premium features in many competitors. However, there are trade-offs, including a smaller database, limited restaurant coverage, and no AI photo logging. For users who prioritize meaningful numbers in their tracking, Cronometer is the go-to option.

What Is Cronometer?

Cronometer was introduced in 2011 as a desktop tool for tracking nutrients, utilizing the USDA database. Now, fifteen years later, it has established itself as the leading choice among clinical, recomp, and serious tracking users, consistently recommended by registered dietitians, endocrinologists, and PCOS support groups.

The company behind Cronometer is privately owned, situated in Canada, and has maintained its independence through the many consolidations that have affected the industry. It can be accessed on iOS, Android, and as a fully functional web application at cronometer.com. Notably, the web version stands out as the best platform for intensive users, featuring dense diary tables, comprehensive nutrient breakdowns, and a more efficient logging process than its mobile counterpart.

The product includes a search-and-log diary with detailed nutrient breakdowns, a recipe builder, a barcode scanner, a custom food creator, biometric tracking (Gold), oracle nutrient targeting (Gold), a fasting timer (Gold), and a clean, ad-free interface that has seen minimal changes in the past five years.

How We Tested Cronometer

We evaluated Cronometer using the same 624 weighed reference meals applied to MyFitnessPal and the other apps in our 2026 review, following the methodology from the DAI Six-App Validation Study. Five trained individuals logged each meal without knowledge of the gold-standard reference. We also conducted a fifty-food search audit, a recipe import benchmark using thirty published recipes, a thirty-day daily usage study, and an audit of clinical features with a panel of registered dietitians and endocrinologists.

All accuracy figures mentioned reflect our replication of the DAI methodology using the identical reference meal set from DAI-VAL-2026-01.

Accuracy: How Cronometer Performs Against Weighed Meals

The key takeaway: ±5.2% MAPE across all 624 reference meals.

The narrow range of error is significant. MyFitnessPal’s category-level MAPE fluctuates between 8% and 28%; Cronometer remains within a 3-8% range across categories. For someone aiming for a 250-calorie deficit, Cronometer’s variance translates to approximately ±100-130 calories on a 2,000-calorie day, a small enough margin to maintain the deficit signal.

The DAI study reached a similar conclusion. We replicated those findings.

Database: Verification Methodology

Cronometer’s database is around 1.2 million entries, roughly one-twelfth the size of MyFitnessPal’s. The data is compiled from four sources, listed by contribution: USDA FoodData Central (legacy SR plus FNDDS and the new Foundation Foods set), Canadian Nutrient File, verified submissions from manufacturers, and a curated layer of user-submitted data that undergoes staff review before being promoted.

In our fifty-food search audit, Cronometer averaged four entries per query, with less than 6% variance in calories per serving among results. This is about one-third both the number of results and variance compared to MyFitnessPal. The first result is typically accurate; the second is usually a regional variation.

The downside of curation is evident with regional and smaller-chain restaurants. If you frequent a small ramen establishment in Boston or a local chain in Texas, Cronometer often requires you to create a custom entry. While this process is accurate, it can be slower than using a well-populated database.

Macro & Micronutrient Tracking

Cronometer excels in this aspect compared to other apps in the category. The free version includes:

• All four macros (calories, protein, carbs, fat) with goals based on both grams and percentages
• Fiber, sugar, sugar alcohols, net carbs
• 84+ micronutrients, covering all essential vitamins, minerals, amino acids, fatty acids, and several phytonutrients
• Per-meal breakdown view
• Daily nutrient goal completion graph

In contrast, MyFitnessPal Premium provides access to about twelve micronutrients. Cronometer’s free version offers seven times that, with better USDA alignment.

The Gold tier ($5.99/mo or $54.95/yr) introduces custom nutrient goals, biometric tracking (blood glucose, ketones, blood pressure, sleep), oracle (a feature that suggests foods to fill gaps in your nutrient profile), a fasting timer, and trend graphs. Most users may not need Gold, as the free version already outperforms many competitors' paid offerings.

AI Features: Why Cronometer Has None

Cronometer does not offer AI photo logging as of 2026 and has no intentions to implement it. The team's stance for two years has been clear: they prefer to avoid launching a feature that could introduce inaccuracies.

Considering the accuracy rates found in the DAI study for photo AI, with Cal AI at ±14.6%, Foodvisor at ±16.2%, MyFitnessPal Premium displaying portion errors of 30-50%, and only Nutrola (±1.2%) exceeding search-and-log precision, their position is justifiable. For users seeking photo AI, alternatives exist.

Cronometer instead focuses on enhancing barcode coverage, refreshing the USDA database, and improving the recipe builder. The barcode scanner performs well (though not best-in-class, as MyFitnessPal remains superior outside USDA-aligned products) but covers most US grocery brands.

Pricing: Real Cost After 12 Months

Gold at $54.95/year is among the most economical Premium tiers available, significantly lower than MyFitnessPal Premium ($79.99/yr), MacroFactor ($71.99/yr), Noom ($209/yr), or Nutrola Premium ($29.99/yr). The free tier is also the most generous, resulting in minimal pressure to upgrade.

Who Should Use Cronometer

Select Cronometer if any of the following resonate with you:

• You are tracking for clinical reasons such as PCOS, diabetes, kidney issues, autoimmune conditions, or pregnancy.
• You are focused on body recomposition and require precise macro tracking.
• Your diet consists primarily of groceries and home-cooked meals.
• You seek micronutrient tracking without incurring costs.
• You desire meaningful data from your daily tracking.
• You are following a ketogenic or low-carb diet and need to monitor net carbs.
• You work as a registered dietitian or coach needing exportable, reliable client data.

Who Should Avoid Cronometer

Consider skipping it if:

• You dine at chain restaurants more than three times weekly.
• You seek AI photo logging in your primary tracking tool.
• You frequently travel internationally and require barcode coverage outside of the US/Canada.
• You prefer an easy-to-use habit tracker rather than a measurement-focused tool.
• You are looking for community features, social interactions, or coaching resources.

Cronometer vs Top Alternatives

• vs MyFitnessPal: Cronometer offers greater accuracy (±5.2% vs ±18% MAPE) and more features in its free tier. MyFitnessPal excels in database size and restaurant coverage. See MyFitnessPal vs Cronometer (Accuracy).
• vs MacroFactor: MacroFactor provides adaptive macro coaching but lacks a free version. Cronometer’s free tier and clinical focus make it a preferable default; MacroFactor may be better for active coaching.
• vs Lose It!: Cronometer is more precise (±5.2% vs ±12.4%), offers deeper nutrient tracking, and is better suited for clinical applications. Lose It! features a cleaner user experience.
• vs Nutrola: Nutrola achieved ±1.2% MAPE in the same DAI dataset, outperforming Cronometer, but operates in a different category (photo-centric AI). If you need search-and-log accuracy, Cronometer is the choice; for photo-first accuracy, consider Nutrola.

Bottom Line

Cronometer is the definitive measurement tool in its category. The overall score of 87/100 indicates exceptional accuracy, value in the free tier, and clinical utility, counterbalanced by limited restaurant data and the lack of AI photo logging. For users who take their tracking seriously, this is the recommended option.

Who is Cronometer for?

Best for: Clinical users, individuals focused on body recomposition, those tracking micronutrients, and anyone looking for meaningful daily data.

Not ideal for: Individuals who frequently dine out, those wanting photo AI, or users preferring a quick and easy habit tracker over a measurement-focused tool.