Metrical vs Cronometer: Micronutrient Depth or Faster Logging?

These two apps are not really competing for the same person. Cronometer is a nutrition analysis tool that happens to count calories. Metrical is a calorie counter that tries to disappear from your day. If you compare them feature by feature, Cronometer wins on paper almost every time — and that is fine, because feature count is not what makes people keep tracking. Here is an honest breakdown of what each one does better.

Where Cronometer Is Genuinely Better

Cronometer tracks up to 84 nutrients: every essential vitamin and mineral, amino acids, and fatty acid profiles. Metrical tracks calories and macros. If you want to know whether you are actually hitting your magnesium, B12, or omega-3 targets, Metrical cannot tell you and Cronometer can. That is not a small gap, and no amount of speed makes up for it if micronutrient tracking is why you are logging food in the first place.

The data quality is also a real difference. Cronometer pulls from lab-analyzed sources — the NCCDB, USDA Standard Reference, the Canadian Nutrient File, and several national food composition databases — rather than crowd-sourced entries, and it says every submitted branded item goes through a verification process. Anyone who has picked the wrong chicken breast out of ten conflicting entries in a crowdsourced app knows why this matters. Metrical estimates from a photo or a description, which is fast but is an estimate, not a lab measurement.

Cronometer also does the things a serious tool needs to do: barcode scanning, biometric logging, syncing with wearables, recipes, and reports and charts you can hand to a dietitian. Metrical has none of that. If you are working with a clinician, managing a medical condition, or doing anything where the numbers have to hold up, Cronometer is the right tool and this comparison should end here.

Where Metrical Is Better

Metrical is a web app. You open metrical.fit in the browser, and you are logging. There is nothing to install — it is not on the App Store or Google Play — and there is no account, no email, no password. That also means the friction of starting is close to zero: you can try it in the time it takes to read this paragraph.

Logging is a photo or a sentence. You take a picture of your plate, or type grilled salmon with rice and a side salad, and the AI estimates calories and macros. Cronometer logging is a search, a match, and a portion size for each component, which is more accurate and takes longer. For a homemade meal with six ingredients, that difference is minutes per day, every day.

Your data stays on your device. Metrical stores everything locally instead of on a server, so there is no account to breach and no eating history sitting in someone else’s database. Cronometer encrypts your data and has a reasonable track record, but it is a cloud service and requires an account, which is a different trust model.

Pricing: Subscription vs One-Time

Cronometer Gold is $10.99 per month, or $4.99 per month billed annually at $59.99. The free tier is genuinely generous — you get the full nutrient tracking, the verified database, the barcode scanner, and custom targets — but it limits reports and charts to a 7-day window, and keeps photo logging, voice logging, custom charts, the fasting timer, and the recipe importer behind Gold.

Metrical is free, including the AI photo estimates. The only paid thing is a Cloud plan at $29.99 once, not per year, and its only job is syncing your data between devices. If you use one phone, you never need it. Over three years, that is $29.99 against roughly $180 of Gold — though you are buying two different products, and the cheaper one does less.

Side by Side

The Honest Trade-Off

Speed and accuracy pull against each other here, and neither app pretends otherwise. A verified database entry with a weighed portion will always beat an AI estimate from a photograph. But the most accurate log is the one that does not exist, and the research on food logging is consistent: most people quit within the first couple of weeks, and the usual reason is that it takes too long. An estimate you record every day tells you more about your habits than precise data you stopped collecting in March.

Who Each One Is For

Choose Cronometer if you care about vitamins and minerals, if you are on a restrictive diet where deficiencies are a real risk, if you want barcode scanning and wearable sync, if you are working with a dietitian or coach, or if you simply want the most rigorous nutrition data available to a consumer. It is the better tool for that work, and the free tier is enough for many people.

Choose Metrical if you want to know roughly how much you are eating without it becoming a project. It suits people who have tried a full-featured tracker and quit, people who would rather not create another account, people who want a free calorie counter with no subscription attached, and people who prefer their food data to stay on their own phone. It is also a reasonable landing spot if you came looking for a MyFitnessPal alternative and found Cronometer heavier than you wanted.

It is also worth saying that Metrical is made by one person, which shows in both directions: the app stays small and focused, and it will never match the integration list of a funded team. If that bothers you, Cronometer is the safer bet.

There is no rule against using both. Some people run Metrical daily for the calorie awareness and spend an occasional week in Cronometer to check whether their micronutrients are actually where they should be. That combination costs nothing and covers both gaps.