How Accurate Is Yazio? We Tested 20 Foods Against USDA Data

Yazio is a calorie tracking app developed in Germany, popular in the DACH region (Germany, Austria, and Switzerland) with a European-focused database and moderate curation. It has expanded significantly into English-speaking markets, but its database roots are distinctly European — and that origin shapes both its strengths and its weaknesses in accuracy testing.

We tested 20 common foods in Yazio and compared each calorie count to the USDA FoodData Central reference database. The average daily deviation was ±155 calories — better than MyFitnessPal (±185) but behind Cronometer (±95). The results reveal a predictable pattern: strong accuracy for European products, weaker performance for US brands and international foods.

How We Tested Yazio's Accuracy

Test Methodology

We applied the same standardized methodology used across all apps in this accuracy testing series:

1. Selected 20 foods representing a typical mixed diet — whole foods, packaged items, restaurant-style dishes, and homemade meals.
2. Searched each food in Yazio using the English-language version of the app with the most natural search term.
3. Selected the top result or the entry appearing most prominently in search results.
4. Recorded the calorie count for the specified serving size.
5. Compared against the matching USDA FoodData Central entry (SR Legacy or Foundation Foods dataset).
6. Calculated the absolute and percentage deviation.

One important note: Yazio's database is optimized for European food products and nomenclature. Some search terms that return instant results in US-centric apps (like specific American brand names) required more effort in Yazio. We used generic food terms for whole foods and the most comparable entries for packaged products.

Reference Standard

All comparisons use USDA FoodData Central, maintained by the USDA's Agricultural Research Service. While Yazio's European database may reference different regional standards (such as the German Federal Food Key or the Swiss Food Composition Database), USDA provides a consistent, lab-analyzed reference point for cross-app comparison.

Yazio Accuracy Test Results: 20 Common Foods

Food (Serving Size)	Yazio (kcal)	USDA Reference (kcal)	Deviation (kcal)	Deviation (%)
Banana, medium (118g)	106	105	+1	+1.0%
Chicken breast, grilled (140g)	224	231	-7	-3.0%
White rice, cooked (200g)	252	260	-8	-3.1%
Whole wheat bread, 1 slice (30g)	72	81	-9	-11.1%
Peanut butter, 2 tbsp (32g)	195	188	+7	+3.7%
Avocado, half (68g)	108	114	-6	-5.3%
Scrambled eggs, 2 large (122g)	196	204	-8	-3.9%
Greek yogurt, plain, 170g	95	97	-2	-2.1%
Olive oil, 1 tbsp (14g)	119	119	0	0.0%
Salmon fillet, baked (170g)	348	354	-6	-1.7%
Sweet potato, baked (150g)	129	135	-6	-4.4%
Cheddar cheese, 1 oz (28g)	110	114	-4	-3.5%
Pasta, cooked (140g)	212	220	-8	-3.6%
Ground beef 85/15, cooked (113g)	242	250	-8	-3.2%
Broccoli, steamed (90g)	29	31	-2	-6.5%
Apple, medium (182g)	93	95	-2	-2.1%
Restaurant chicken burrito (est. 450g)	790	920	-130	-14.1%
Homemade chicken stir-fry (350g)	425	485	-60	-12.4%
Store-brand granola bar (40g)	168	190	-22	-11.6%
International instant noodles (85g dry)	375	410	-35	-8.5%

Average absolute deviation: ±16.6 kcal per food item. Over a full day of logging 10+ items, this compounds to approximately ±155 calories per day.

The European Database Advantage — and Limitation

Where Yazio's European Roots Help

Yazio's database was built primarily for the German-speaking market and then expanded across Europe. This means European products are well-represented and relatively accurate. If you live in Germany, Austria, or Switzerland and buy most of your food from Aldi, Lidl, REWE, Migros, or Spar, Yazio's barcode scanner and food database will likely serve you well.

European food labeling regulations (EU Regulation No. 1169/2011) require standardized nutrition declarations on packaged foods, with mandatory per-100g values. This standardization creates a more consistent foundation for database entries than the per-serving labeling used in the US market. Yazio benefits from this regulatory consistency.

Where the European Focus Creates Gaps

The same European focus that strengthens Yazio's DACH-region accuracy creates meaningful gaps for other markets:

US brands and products. American-specific brands, regional US grocery items, and US restaurant chains are less well-covered in Yazio's database. Our test used generic food terms rather than specific US brand names, but users who eat primarily US-branded products will find more missing or inaccurate entries than they would in a US-centric app.

Asian and Latin American foods. International cuisines beyond European and American standards are poorly represented. Asian staples like specific types of tofu, regional noodle varieties, and traditional preparations have limited coverage. Latin American staples — specific types of beans, plantain preparations, regional cheeses — face similar gaps.

US restaurant meals. American chain restaurants are well-covered in US-developed apps because millions of American users have submitted entries. Yazio's restaurant food coverage tilts European, and US restaurant entries are often less detailed or missing entirely.

Barcode Scanning: A Regional Accuracy Story

DACH Region Performance

Yazio's barcode scanner is strong in its home market. Products sold in Germany, Austria, and Switzerland scan reliably, and the nutrition data typically matches the current label. This is partly because Yazio's development team actively maintains the database for this region and partly because European barcode standards (EAN-13) are well-integrated.

For users in the DACH region, Yazio's barcode scanning accuracy for locally purchased products is approximately 90-93% — comparable to MyFitnessPal's barcode accuracy for US products.

International Barcode Performance

Outside the DACH region, barcode scanning accuracy drops. US products, UK products, and products from markets outside Europe return "not found" more frequently. When they are found, the nutrition data may be sourced from user submissions rather than Yazio's curated database, introducing the same accuracy issues that affect crowdsourced databases.

The barcode conflict issue also applies: identical barcodes can correspond to different products in different regions. A barcode scanned in Berlin might return accurate data for a German product, but the same barcode scanned in Chicago might return data for a completely different product — or no data at all.

Where Is Yazio Actually Accurate?

European Packaged Products

Yazio excels with packaged products sold in the DACH region and broader European market. The combination of EU standardized nutrition labeling and Yazio's curated database for this market means European packaged foods are typically accurate within 2-5% of label values.

Basic Whole Foods

For common whole foods — fruits, vegetables, plain meats, grains — Yazio's accuracy is solid, though not quite at Cronometer's USDA-matched level. Our test showed small but consistent deviations of 2-6% for most whole foods. These deviations likely reflect differences between the European food composition data sources Yazio references and the USDA values we use as our reference standard. Slight nutritional differences in produce across regions (different soil, climate, varieties) can account for some of this gap.

Simple Home-Cooked Meals from European Cuisines

Yazio has reasonable entries for traditional European preparations — German, Austrian, Italian, French dishes. Users who cook these cuisines at home and search for specific dish names will find entries that are more representative of actual European cooking methods and portion sizes than what US-centric apps provide.

Where Does Yazio's Accuracy Break Down?

US Brands and Products

If you live in the US and use Yazio, you will regularly encounter missing entries for regional grocery brands, local products, and US-specific formulations. Even major US brands may have entries that are outdated or based on European formulations (which sometimes differ from US versions of the same product due to different regulatory requirements and ingredient standards).

Asian and Latin American Foods

Our test showed an 8.5% undercount for international instant noodles. This gap widens for less common international foods. Users who eat Korean, Japanese, Thai, Indian, Mexican, or Brazilian cuisine will find significant database gaps, forcing reliance on generic entries or manual custom food creation.

Restaurant Food

Our test showed a 14.1% undercount for a restaurant chicken burrito — a 130-calorie miss. Restaurant food is a weakness for all calorie trackers, but Yazio's limited US restaurant database makes this worse for users eating at American restaurants. European restaurant chains are somewhat better covered, but the fundamental problem remains: restaurant preparations use more oil, butter, and larger portions than generic database entries suggest.

Per FDA labeling regulations (21 CFR 101.9), only US restaurant chains with 20+ locations are required to provide calorie information, and even those are allowed a 20% margin of error. Most restaurant meals logged in any calorie tracker are estimates, and Yazio is no exception.

Homemade Complex Meals

Our test showed a 12.4% undercount for homemade chicken stir-fry. Like all apps without AI photo logging, Yazio depends entirely on the user's ability to accurately decompose a meal into individual ingredients and estimate each portion. Research from the American Journal of Clinical Nutrition consistently shows that people underestimate cooking fats, sauces, and calorie-dense ingredients.

How Daily Errors Compound Over Time

The Compounding Calculation

Yazio's ±155 calorie average daily deviation places it in the middle of the calorie tracker accuracy spectrum. Here is how it compounds:

Time Period	Cumulative Error (kcal)	Equivalent Fat (lbs)
1 week	1,085	0.31
1 month	4,650	1.33
3 months	13,950	3.99
6 months	27,900	7.97

Over six months, a ±155 calorie daily deviation accounts for approximately 8 pounds of untracked calories. For someone targeting a 500-calorie daily deficit for steady fat loss of about 1 pound per week, this deviation reduces the effective deficit to 345 calories — slowing expected weight loss by roughly 30%.

The deviation tends to skew toward undercounting, particularly for restaurant and homemade meals. This means users are more likely to be eating more than their log suggests than eating less.

How Yazio Compares to Other Calorie Trackers

Feature	Yazio	MyFitnessPal	Cronometer	Nutrola
Average daily deviation	±155 kcal	±185 kcal	±95 kcal	Aligned with USDA
Database type	Moderate curation	Crowdsourced	USDA/NCCDB curated	Nutritionist-verified
Best region	DACH / Europe	United States	Universal (whole foods)	Universal
Photo AI logging	No	No	No	Yes
Voice logging	No	No	No	Yes
Barcode scanning	Yes (EU-focused)	Yes (US-focused)	Yes (limited)	Yes
Ads	Yes (free tier)	Yes (free tier)	No	No ads on any tier
Price	Free / €44.99/year Pro	Free / $19.99/month	Free / $49.99/year	€2.50/month

How Yazio's Accuracy Compares to Nutrola

Nutrola approaches the accuracy problem differently from Yazio. Where Yazio's database is regionally strong (DACH) with gaps elsewhere, Nutrola's 1.8 million+ nutritionist-verified entries are designed for global coverage without regional blind spots.

The key accuracy differences:

Database verification. Every entry in Nutrola's database has been reviewed by nutrition professionals. Yazio uses moderate curation — some entries are verified, others are user-submitted. Users cannot always distinguish between the two in the search interface.

AI-assisted logging. Nutrola's photo AI and voice logging reduce the manual entry errors that affect Yazio users. When you photograph a meal, Nutrola's AI identifies components and matches them against verified data. When you describe a meal by voice, the app parses the description and logs verified entries. These features directly address the homemade meal accuracy problem that accounts for much of Yazio's deviation.

No regional bias. Nutrola's verified database covers products across markets without the European-centric bias that creates gaps for Yazio users outside the DACH region. Whether you are scanning a product in Munich, Manhattan, or Melbourne, the underlying data has the same verification standard.

Price and experience. Nutrola costs €2.50/month with no ads on any tier. Yazio's Pro subscription is €44.99/year (approximately €3.75/month), also ad-free. Both are reasonable, but Nutrola's lower price point includes features (photo AI, voice logging) that Yazio charges for or does not offer.

Should You Still Use Yazio?

Yazio is a solid choice for users in the DACH region who eat primarily European products and home-cooked European cuisine. Its database serves this market well, the barcode scanner works reliably for local products, and the app's interface is clean and well-designed.

For users outside Europe, or users whose diets include significant US, Asian, or Latin American foods, Yazio's regional database bias creates accuracy gaps that compound over time. A ±155 calorie daily deviation is meaningful for anyone pursuing specific body composition goals.

For users who want verified accuracy regardless of region, modern logging features like photo AI and voice input, and an ad-free experience at a competitive price, Nutrola's nutritionist-verified database provides consistent accuracy across markets and food types — no regional blind spots, no unverified entries, and no guesswork about which entries are curated and which are user-submitted.

Frequently Asked Questions

Is Yazio accurate for calorie counting?

Yazio is moderately accurate, with an average daily deviation of ±155 calories in our testing. It performs best with European products (especially from the DACH region) and basic whole foods, but shows larger deviations for US brands, restaurant meals, and international cuisines. For users in Germany, Austria, or Switzerland eating locally purchased products, Yazio's accuracy is above average among calorie trackers.

Is Yazio better than MyFitnessPal?

In our accuracy testing, Yazio showed slightly better average accuracy than MyFitnessPal (±155 kcal/day vs. ±185 kcal/day). Yazio's moderate curation produces more reliable results than MyFitnessPal's fully crowdsourced database for whole foods and European products. However, MyFitnessPal has a larger database of US products and restaurant foods. The best choice depends on where you live and what you eat.

Does Yazio's barcode scanner work outside Europe?

Yazio's barcode scanner works outside Europe but with reduced accuracy and coverage. Products from the DACH region scan reliably, and major European brands are well-covered. US products, Asian products, and items from other markets return "not found" more frequently or may map to incorrect entries. Users outside Europe may need to manually enter products more often.

How does Yazio compare to Cronometer for accuracy?

Cronometer is significantly more accurate than Yazio for whole foods (±95 kcal/day vs. ±155 kcal/day) because Cronometer sources data directly from USDA FoodData Central and NCCDB. However, Yazio may have better coverage for European branded products. For users prioritizing raw accuracy with whole foods and micronutrient tracking, Cronometer is the stronger choice. For European users wanting a broader branded product database, Yazio may be more practical.

What is the most accurate calorie tracking app for European users?

For European users, accuracy depends on diet composition. For whole foods, Cronometer and Nutrola both provide USDA-aligned accuracy. For European branded products, Yazio offers strong regional coverage. For an app that combines verified accuracy across all food types — whole foods, branded products, and international items — with modern features like photo AI and voice logging, Nutrola's nutritionist-verified database provides consistent accuracy at €2.50/month on iOS and Android.