The Yuka app is a barcode-scanning app that evaluates food and cosmetic products, giving users a clear, color-coded health rating based on nutritional value, additives, and organic quality. It is designed to help users make healthier choices quickly and easily. The app uses a science-backed scoring system derived from Nutri-Score and data from authorities like the FDA, EFSA, and WHO. It also provides detailed ingredient breakdowns and suggests healthier alternatives for poorly rated products. Users appreciate its simplicity, comprehensive product database, and independence from brand influence. However, some critiques mention that the food rating system can be oversimplified or arbitrary in weighting, and it may cause guilt in users sensitive about food choices. Overall, the app is praised for saving time decoding ingredient lists and promoting healthier decisions.