Overview: What Is Cronometer?
Cronometer is a Canadian-built nutrition tracking app launched in 2011 by an engineer who was personally interested in extreme caloric restriction research. That origin story matters, because Cronometer was designed first and foremost as a precision micronutrient tracker, not a weight-loss gamification tool. It tracks 84 nutrients per food entry — every macronutrient, every essential vitamin and mineral, plus amino acids, fatty acid profiles, and bioactive compounds. No mainstream competitor (MyFitnessPal, Lose It, Noom) comes close on data depth.
Cronometer is the tool dietitians, biohackers, athletes, and clinical nutrition researchers reach for when they need numbers they can trust. It is not the easiest tracker to use. It is the most accurate.
Pricing Breakdown
| Plan | Price/Month | Details |
|---|---|---|
| Free | $0 | Basic nutrition tracking, Ad-supported, All foods in one list (no meal grouping), Core micronutrient tracking |
| Cronometer Gold Monthly | $8.99 | AI photo food logging, Ad-free, Custom charts, Recipe importing, Meal grouping |
| Cronometer Gold Annual | $4.08 | $49/year billed annually, All Gold features, Best consumer value |
| Cronometer Pro | $39.99 | Professional dietitian tools, Multiple client accounts, Advanced reporting |
The free tier is fully functional for nutrition tracking — you get all 84 micronutrients, the food database, barcode scanning, and core charts. The catch is intrusive video ads that interrupt logging, and the lack of meal grouping (everything goes into one daily list). Gold at $4.08/month annual ($49/year) removes ads, adds AI photo food logging, custom charts, recipe importing, and meal grouping. Pro at $39.99/month is a different product entirely — it's designed for dietitians and nutritionists managing multiple client accounts with advanced reporting.
At $4-$9/month, Cronometer Gold is one of the cheapest premium nutrition apps on the market and dramatically cheaper than Noom ($60/month) for users whose primary need is data, not coaching.
Key Features
- Tracks 84 micronutrients and macronutrients — most comprehensive in market
- AI-powered photo food logging (Gold feature)
- Custom food entry and recipe creation
- Barcode scanning for packaged foods
- Integration with 80+ fitness devices and apps
- Cronometer Gold: AI photo logging, custom charts, recipe importing
- Cronometer Pro: Professional dietitian tools
- Blood biomarker tracking
The food database is a key differentiator. Cronometer's database draws from the USDA National Nutrient Database, the Nutrition Coordinating Center Food & Nutrient Database, and verified user submissions, with strict data quality controls. Many MyFitnessPal entries are user-generated and unverified — calorie counts are often wrong by 30% or more. Cronometer's verified entries (marked with a checkmark) are reliable enough to use for clinical research.
Biomarker tracking is another underused feature. You can log blood test results (lipid panel, glucose, vitamin D, B12, ferritin) and Cronometer plots them against your nutritional intake over time, helping you correlate dietary changes with measurable physiological markers. For users with deficiencies or chronic conditions, this is a meaningful clinical tool.
The AI Component
Cronometer's AI is concentrated in the Gold tier's photo food logging. You take a picture of your meal, and the AI identifies the foods, estimates portion sizes, and logs them. Accuracy is good for distinct, well-plated foods (a salad with visible ingredients) and weaker for mixed dishes, casseroles, or cuisines with unusual ingredients. It's a time-saver, not a replacement for manual logging when you need precision.
AI also powers the food search ranking, the recipe nutrition analysis, and the trend detection that flags emerging deficiencies (e.g., persistent low B12 over 30 days). None of this is groundbreaking AI research, but the implementation is solid.
Pros and Cons
Strengths
- ✓ 84 nutrients tracked — most comprehensive in market
- ✓ Verified food database from USDA and NCC sources
- ✓ Cheapest serious premium nutrition app: $49/year
- ✓ AI photo food logging on Gold tier
- ✓ Biomarker tracking for clinical-grade self-experimentation
- ✓ Trusted by dietitians and clinical researchers
Weaknesses
- ✗ Intrusive full-screen video ads in free version that run up to 30 seconds mid-logging
- ✗ Food database gaps — particularly for UK and non-US packaged foods
- ✗ Interface overwhelming for casual users — too much data density
- ✗ Post-November 2022 redesign received backlash — poor night mode, low contrast, excessive scrolling
- ✗ Slow Android app startup time
- ✗ Manual food entry burden causes logging fatigue — most users quit within 3 weeks per research
- ✗ Trustpilot 3.3/5 — ads and Gold pricing complaints dominate
- ✗ Free version lacks meal grouping — usability disadvantage vs competitors
Cronometer vs MyFitnessPal vs Noom
MyFitnessPal has a larger food database but much lower data quality — most entries are user-submitted and unverified. For weight loss tracking with rough estimates, MyFitnessPal is fine. For clinical-grade nutrition tracking, Cronometer is in a different league. Noom is a behavior change program with food logging attached; if you want coaching and psychology lessons, use Noom; if you want accurate data, use Cronometer. For most serious users, the right answer is Cronometer Gold annual at $49/year.
Who Should Use Cronometer
Cronometer is best for data-driven users: athletes optimizing macros and micros, dietitians and their clients, people with diagnosed nutrient deficiencies, biohackers, vegetarians and vegans concerned about B12/iron/zinc/omega-3, and anyone managing chronic conditions (diabetes, kidney disease, IBD) that demand precise dietary tracking. It is ideal if you would rather spend two minutes logging accurately than thirty seconds logging carelessly.
Cronometer is not the right choice for casual users who want gamified weight loss, social features, or hand-holding. It's a precision instrument with a learning curve, and casual users will find it overwhelming.
Verdict
Cronometer is the gold standard for nutrition tracking accuracy. The Gold tier at $49/year is one of the best values in the entire health-app category. For anyone who wants to actually understand what they're eating at the nutrient level — not just calories — there is no better tool. We strongly recommend Cronometer for data-driven users and dietitians; we don't recommend it for casual weight-loss users who would be better served by Noom or MyFitnessPal.
↗ affiliate link — 35% commission on Gold