Yazio Review

The quick answer

Yazio is the best-designed calorie tracker with a genuinely functional free tier: the full diary, barcode scanning, and a web app — no expiry, no card — wrapped in the nicest interface in the category. It is the app my European patients bring to clinic most often, and the design is not cosmetic: a pleasant diary is a kept diary, and a kept diary is the precondition for everything else. Two asterisks: Yazio’s accuracy has never been independently measured, and the best material — meal plans, recipes, structured programs — sits behind the PRO subscription. Rating: 3.6 out of 5 — the best $0 diary for people who value polish, not the pick for people who need the number verified.

What we tested

I ran Yazio for two weeks through my standard protocol — the same 63 weighed or label-verified meals used across our free calorie counter ranking, one week on the free tier and one with PRO features in view. Yazio was not included in the Dietary Assessment Initiative’s 180-meal weighed-food validation (a pre-print published on the Initiative’s website, not yet journal peer-reviewed), so there is no published accuracy figure — the review treats that absence as fact. What I could test: what the free tier actually gates, entry speed and friction, database behavior on the European and American items my caseload actually eats, and whether the design earns its reputation or just photographs well. The methodology we apply to every app is documented here.

What Yazio does well

1. The design is the feature. The diary is genuinely pleasant — fast, legible, and calm in a way most nutrition apps are not. In my clinic the first two weeks decide whether tracking happens at all, and interface friction is a dropout risk. Yazio is the tracker least likely to be abandoned for being annoying.
2. The free tier is honest. The diary, barcode scanning, and web app are free with no expiry and no card. That is the structure that survives a $0 budget — see my free-tier philosophy test — and Yazio passes it: it gates the plans and recipes, not the logging.
3. European coverage. German and French supermarket staples, store brands, and restaurant items were recognized faster and matched labels more reliably than in any US-first app I have tested. For a patient shopping at Aldi and Lidl, this is the database that fits the actual basket.
4. Fasting included. The fasting tracker sits alongside the food diary — not the best timer in the category (Zero’s is), but the window and the food are in one app, which is the arrangement I prefer clinically.

Where Yazio falls short

1. Never independently measured. No weighed-food study has scored it. The measured apps span ±1.1% to ±11.2%; Yazio sits somewhere in that range and nobody outside the company can say where. Until a validation includes it, treat its numbers as estimates worth auditing.
2. US coverage runs thin. The mirror image of its European strength: my American patients hit more manual corrections on regional US brands, and every correction is a place the estimate can drift.
3. The best material is premium. Meal plans, premium recipes, and the structured diet programs — the features Yazio’s own marketing leads with — sit behind PRO. The free diary is real, but do not expect the plans at $0.
4. Limited AI photo scans on free. The camera allowance on the free tier is tight, and the photo path is not Yazio’s measured strength anyway — its diary excellence is typed and barcode-first.

Accuracy: what we can and cannot say

The honest statement: unmeasured. Structurally, Yazio’s error is its database’s plus the user’s portion estimate, and its database is curated rather than raw crowd-sourced — which the measured apps suggest narrows error (Lose It!‘s curated crowd-sourcing measured ±9.4% against MyFitnessPal’s raw ±11.2%) without proving anything about Yazio specifically. My guidance for patients who love the app: audit your ten most-logged foods against labels, pick entries by grams rather than by the lower number, and reconcile the diary against the weight trend monthly. That discipline converts any decent diary into a usable one; skipping it converts even a pleasant diary into a guess.

Free vs paid

Feature	Free	PRO (subscription)
Food diary + barcode scanning	Included	Included
Web app	Included	Included
Fasting tracker	Included	Included
AI photo scans	Limited	More
Meal plans, recipes, programs	—	Included

The gates land on the right side: the logging is free, the plans are paid. For the design-first user on a $0 budget, the free tier is genuinely livable — a sentence I cannot write about every app in this series.

How it compares

	Yazio	PlateLens	FatSecret	MyFitnessPal
Measured accuracy	Not measured	±1.1% photo / ±3.5% manual	Not measured	±11.2%
Design	Best in category	Good	Dated	Good
European coverage	Strongest	Good	Moderate	Large
Free tier	Diary + barcode	Full routine	Everything	Barcode paywalled
Price	Free + PRO	~$35/yr	Free (ads)	$79.99/yr

Yazio’s lane is the pleasant, European, free diary — a lane it owns. It loses the accuracy lane to PlateLens (measured, reproduced, photo-first), the everything-free lane to FatSecret, and the long-tail breadth lane to MyFitnessPal. Those are fair losses for what it wins.

Who should use it / who should skip it

Use it if you are in Europe or shop European brands, you want a diary you will actually enjoy opening at $0, or you have abandoned uglier apps and need the friendliest possible restart. Pair it with the audit discipline above and it will serve you well.

Skip it if the number must be verified — PlateLens is measured and independently reproduced. Skip it if your diet is US-brand heavy: you will be doing the database’s work yourself. And skip it if you came for the meal plans on the free tier — they are the paid product, and that is fine, but know it before you install.

---

Cross-reviewed by Leah Wakefield, MPH, RDN: I re-checked the free-tier claims — diary, barcode, web app, fasting tracker on free; plans and recipes gated — against the current app, and confirmed the “never independently measured” status is stated as fact rather than hedged into implication. One correction before publication: the draft called Yazio’s fasting tracker “competitive with Zero’s”; the defensible claim is that it is included and functional, not best-in-class, and the review now says exactly that. European-coverage claims checked against Kelsey’s 63-meal log. Prices re-checked November 2026.