Build a Diet and Calorie Tracker App

Diet tracking is a popular way to manage weight, fitness, and health. This app teaches core app development skills like logging systems, nutrition API integration, daily analytics, and user behavior patterns—ideal for building a fitness or wellness platform.

Users log their meals, get automatic calorie counts, and track macronutrients (protein, carbs, fats). The app offers charts, reminders, and personalized targets based on weight and goal (e.g., maintain, lose, or gain weight).

The user enters their age, weight, activity level, and diet goal. Based on this, daily calorie targets are calculated. As users log meals, the app updates daily totals and compares them with targets. It also provides nutrient summaries and weekly performance reports.

• Users enter food items via search, voice input, or barcode scan.
• Each item has calorie and macro data pulled from a nutrition database.
• Daily totals update in real-time and are compared against goals.
• Progress bars show intake by category (protein, carbs, fats).
• Weekly and monthly reports help assess consistency and goal progress.

• Nutritionix API Docs
• React Native Barcode Scanner
• Edamam Nutrition Data API
• UI Design Inspiration for Food Trackers
• Health Calculators (BMR, TDEE)