Cronometer

Cronometer is a nutrition tracking app known for detail and accuracy. Users log food, exercise and biometrics, and Cronometer reports not just calories and macronutrients but dozens of micronutrients - vitamins, minerals, amino acids and more - against recommended targets. Accuracy is its main differentiator. Many calorie counters rely heavily on user-submitted food entries, which leads to duplicates and errors. Cronometer emphasises curated and lab-analysed data sources, such as government nutrient databases, and verifies entries, so the numbers are more trustworthy. That makes it a favourite of dietitians, people following specific diets such as keto, vegan or low-sodium, athletes managing performance nutrition, and anyone who wants to know whether their diet actually covers their nutrient needs. The app covers the full tracking workflow: barcode scanning, recipe creation, custom foods, meal planning and fasting tracking, plus biometrics such as weight, blood pressure and blood glucose. It integrates with wearables and health platforms including Apple Health, Fitbit, Garmin and continuous glucose monitors, and trends and charts reveal long-term patterns. A professional version lets dietitians and coaches monitor clients' logs. The basic app is free, with a Gold subscription adding features such as advanced analysis, custom charts, timestamps and removal of ads. The trade-off of depth is a denser interface than mass-market calorie apps, and the most detailed insights depend on logging diligently, including weighing food. Alternatives include MyFitnessPal, with the largest food database and strong social features but less reliable data; Lose It! for simpler weight-loss tracking; MacroFactor for adaptive calorie and macro coaching; Carb Manager for low-carb diets; Yazio for a polished European alternative; and Noom for behaviour-change coaching. Choose Cronometer when you care about nutrient accuracy and micronutrients, not just calories. Choose a simpler app if fast calorie counting is all you need.