Nutrition Accuracy Report
We tested Zuppy, MyFitnessPal, and Yazio against USDA FoodData Central — a widely used government reference for nutritional data. Here's what we found.
Important: Read this first
For each food, we used the verified or "Best Match" entry in MyFitnessPal and the default entry on Yazio's public food database, giving each competitor the best available data for every food item. All three apps were scored against the same USDA reference values using identical criteria.
The scoring formula is purely mathematical — it compares reported nutrient values against USDA reference data with no subjective judgment. Zuppy sources its data directly from USDA FoodData Central, which is also the benchmark used in this test. This structural advantage is disclosed for full transparency.
This comparison measures how closely each app's database entries match USDA reference values for these specific foods. It does not measure overall app accuracy for food recognition, portion estimation, or user-contributed entries.
We encourage you to verify this benchmark yourself. Every food entry links directly to its USDA FoodData Central source page, and the full scoring methodology is documented above. Every result on this page can be independently checked.
Zuppy
100/100
Highest in our test
MyFitnessPal
95.36/100
Yazio
92.01/100
How we tested
We selected 38 common foods spanning multiple food categories. For each food, we retrieved nutritional values from the USDA FoodData Central database — the same dataset that Zuppy uses as its nutrition source. We then looked up the same food in each app and compared their reported calorie and macronutrient values against the USDA reference.
Each food receives a score from 0–100 based on how closely the reported values match the USDA reference. A score of 100 means an exact or near-exact match across calories, protein, carbohydrates, and fat. The overall score is the average across all tested foods.
Transparency note
This analysis was conducted by the Zuppy team. We publish the full food list, raw values, and scoring methodology so anyone can verify our results. Because Zuppy sources its data directly from USDA FDC — the same dataset used as the benchmark — its high score is expected. This structural advantage should be considered when interpreting results. Data was collected in March 2026 and results may change as apps update their databases.
Ground truth source: USDA FoodData Central (fdc.nal.usda.gov)
Full comparison
Proteins
7Grains
6Fruits
6Vegetables
6Dairy
4Fats/nuts
5Other
4Tap a food to compare macros. Values deviating >3% from USDA are highlighted yellow; >10% red.
Category breakdown
Dairy
4 foods tested
Fats/nuts
5 foods tested
Fruits
6 foods tested
Grains
6 foods tested
Other
4 foods tested
Proteins
7 foods tested
Vegetables
6 foods tested
Full report
Download the complete accuracy report with raw data and methodology details.