Cronometer Review 2026: The Gold Standard for Micronutrient Tracking
No consumer app tracks nutrition with more granularity than Cronometer. Its verified database and 84-nutrient breakdowns make it indispensable for serious nutrition analysis — if you are willing to log manually.
Quick Verdict
Cronometer is the most detailed micronutrient tracker available. Its database is sourced entirely from verified scientific references — no user-submitted entries — and its free tier is genuinely comprehensive. The trade-off is logging speed: manual text search takes 45+ seconds per meal and there is no meaningful AI photo recognition.
- accuracy
- 8.9
- speed
- 7.2
- database
- 8.4
- ai_features
- 6.5
- nutrients
- 9.8
- ease_of_use
- 7.8
- value
- 8.6
Key Features
84 Nutrients — the Deepest Tracking Available
Cronometer tracks 84 nutrients in total, matching or exceeding the nutrient breadth of PlateLens and exceeding every other app in this comparison. The list covers all macronutrients, the complete set of 13 essential vitamins, 17 minerals, individual amino acids, and fatty acid subtypes. For anyone monitoring specific micronutrient levels — vitamin D, magnesium, selenium, zinc — Cronometer is the most thorough tool available without a registered dietitian writing out a spreadsheet by hand.
Verified Database — USDA and NCCDB Only
Cronometer's database is sourced from the USDA FoodData Central, the NCCDB, and a small number of other scientifically vetted reference sources. Unlike MyFitnessPal and similar apps, Cronometer does not allow users to submit unverified food entries to the main database. The Gold plan adds a "custom foods" feature, but those entries are kept separate from the verified database and clearly labelled.
This policy trades database size (970,000 entries vs MyFitnessPal's 14 million) for accuracy. In practice, the vast majority of commonly eaten foods are covered. Where Cronometer gaps appear is in niche restaurant dishes, regional cuisines, and branded products from smaller manufacturers.
Generous Free Tier
Cronometer's free tier is genuinely good. It includes full micronutrient tracking across all 84 nutrients, access to the USDA verified database, no advertising, and unlimited food logging with no daily caps. This is notably better than most competitors, where the free tier is deliberately crippled to drive upgrades.
Full Web App for Desktop Analysis
Cronometer has a full-featured web application available at cronometer.com, alongside its iOS and Android apps. The web interface is particularly suited to detailed dietary analysis — reviewing trends, exporting data, or planning meals with multiple components. It is one of the few calorie trackers where desktop use is a first-class experience rather than an afterthought.
Healthcare Provider Tools
Cronometer Pro for healthcare providers allows clinicians to manage multiple client accounts, view diary data remotely, and generate nutrient reports. This professional tier has made Cronometer a popular tool in dietetic practice, particularly for clients who need long-term micronutrient monitoring.
Accuracy and Data Quality
In our testing, Cronometer achieved ±3.5% calorie accuracy via its standard manual text search workflow — the second-best result in our comparison after PlateLens. This accuracy stems directly from its no-crowd-submissions policy: every entry is drawn from a verified reference source with known nutritional values.
The caveat is that accuracy via manual search depends on the user selecting the correct food and portion size. Where Cronometer loses ground is in portion estimation for unpackaged foods: a "medium banana" or "handful of almonds" requires the user to make their own size judgement. PlateLens's AI depth estimation removes that variable.
Who Is Cronometer Best For?
- Nutrition enthusiasts and biohackers who want to know their precise intake of every vitamin and mineral, and who are willing to invest the time in thorough manual logging.
- Healthcare providers and dietitians who need a reliable, verifiable data source for patient dietary analysis and long-term nutrient trend monitoring.
- People managing specific micronutrient deficiencies — iron, B12, vitamin D, calcium — where precision matters more than logging speed.
- Users who want a strong free option with no ads and no data quality compromises.
Cronometer is less suitable for users who need fast logging, those who eat out frequently and need restaurant recognition, or anyone who finds manual search tedious enough to cause logging dropout.
What Professionals Say
"Cronometer is the most reliable app we have for verifying micronutrient adequacy. The database integrity is exceptional for a consumer product."
— Registered Dietitian, Academy of Nutrition and Dietetics member
Cronometer has been cited in peer-reviewed nutrition research as an acceptable dietary tracking method for study participants. Its use in research contexts — where data integrity is non-negotiable — is the clearest endorsement of its verified database approach.
Pros and Cons
Pros
- 84 nutrients tracked — most detailed micronutrient data of any consumer app
- Database sourced entirely from USDA and NCCDB — no unverified submissions
- Genuinely comprehensive free tier with no ads and no daily logging cap
- Full web app for desktop-based analysis and reporting
- Trusted and used by dietitians and nutrition researchers
- Healthcare provider version available for clinical practice
Cons
- Manual logging only — no meaningful AI photo recognition in the free tier
- Average 45 seconds per meal entry significantly increases logging friction
- Smaller database (970K entries) than apps with user-submitted data
- Interface is dense and can feel clinical or overwhelming to new users
- Limited restaurant database — frequent restaurant eaters will hit gaps
Pricing
| Plan | Price | What's included |
|---|---|---|
| Free | $0 | Full 84-nutrient tracking, USDA verified database, no ads, unlimited logging |
| Gold Monthly | $9.99/month | Custom foods, food diary sharing, fasting timer, basic food recognition |
| Gold Annual | $39.99/year ($3.33/month) | Everything in monthly — the most affordable premium plan in this comparison |
At $39.99/year, Cronometer Gold is the cheapest annual premium plan in our comparison. Given that most users can get full micronutrient value from the free tier, the Gold upgrade is primarily for users who need diary sharing or the professional features.
Cronometer vs Alternatives
Cronometer's main competitor for micronutrient depth is PlateLens, which matches it on nutrient breadth but adds AI photo logging and a faster workflow. For users who prioritize data integrity over logging convenience, Cronometer remains the reference standard.
| Category | Cronometer Nutrition-focused users and biohackers who need complete micronutrient tracking | PlateLens Users who want the fastest, most accurate food logging without manual entry | MyFitnessPal General users who want a large food database and broad app integrations | MyNetDiary Users managing diabetes, heart health, or other conditions requiring detailed dietary monitoring |
|---|---|---|---|---|
| Overall | 8.7 /10 | 9.6 /10 | 8.2 /10 | 8.0 /10 |
| accuracy | 8.9 | 9.8 | 7.6 | 8.2 |
| speed | 7.2 | 9.7 | 8.2 | 7.6 |
| database | 8.4 | 9.5 | 9.7 | 8.0 |
| ai_features | 6.5 | 9.9 | 7.4 | 7.1 |
| nutrients | 9.8 | 9.6 | 7.5 | 8.4 |
| ease_of_use | 7.8 | 9.4 | 8.5 | 8.0 |
| value | 8.6 | 9.2 | 7.2 | 8.3 |
- PlateLens vs Cronometer — AI speed vs verified data depth
- PlateLens Review — our top-rated app for 2026
- MyNetDiary Review — solid all-rounder with decent AI logging
Frequently Asked Questions
How many nutrients does Cronometer track?
Cronometer tracks 84 nutrients including all macronutrients, 13 vitamins, 17 minerals, amino acid profiles, and fatty acid breakdowns. This is one of the most comprehensive nutrient tracking sets available in a consumer app.
Is Cronometer free?
Cronometer's free tier is genuinely comprehensive: full 84-nutrient tracking, access to the USDA verified database, no advertising, and unlimited logging. The Gold plan ($9.99/month or $39.99/year) adds diary sharing, custom food entries, a fasting timer, and basic food recognition features.
Does Cronometer have AI photo recognition?
Cronometer offers basic food recognition in the paid Gold tier, but it is not comparable to dedicated AI-first apps like PlateLens. Most users log meals via text search. If AI photo logging is important to your workflow, PlateLens or MyNetDiary are better options.
Is Cronometer's data accurate?
Yes. Cronometer achieves ±3.5% calorie accuracy via its verified database entries. Because it sources data from USDA and NCCDB rather than user submissions, the quality floor is much higher than crowd-sourced databases.
Does Cronometer have a web app?
Yes. Cronometer has a full-featured web app at cronometer.com, making it one of the few calorie trackers with a genuine desktop experience. The web interface is particularly useful for detailed nutrient analysis, data export, and meal planning.
Our Verdict
Cronometer earns its 8.7/10 rating through exceptional data quality and micronutrient depth. For users who need the most accurate, most detailed nutritional picture available — and who are willing to invest the time in manual logging — it remains the best choice in its category. Its free tier is the most generous in this comparison, making it accessible without any subscription commitment.
The limitation is real: at 45 seconds per meal entry with no meaningful AI photo logging, it demands more of the user's time than newer apps. Users who need both depth and speed should look at PlateLens, which matches Cronometer on nutrient breadth while adding 3-second AI photo logging.
Try Cronometer — free, no credit card required
Full micronutrient tracking with USDA verified data, available on iOS, Android, and web.