0xCal is an AI calorie tracker designed specifically for iPhone that makes food logging effortless through natural interactions. Instead of tedious manual entry, users can simply describe what they ate or take photos of their meals.

The app features gram, an AI nutrition assistant that instantly calculates calories, carbs, protein, and fats when users describe their meals naturally. It offers photo-based tracking where AI recognizes foods and packaging from pictures, plus chat-based logging that eliminates searching through databases. Personalized calorie budgets are created based on user health data with options for weight loss, maintenance, or weight gain goals.

The AI processes natural language descriptions and image recognition to extract nutritional information automatically. Users can describe meals conversationally or snap photos, and the AI handles the calorie calculations without manual database searches.

The app provides smart insights tracking daily calories and macros, monitors weekly and monthly success rates, displays weight history with charts, and tracks steps and activity levels. It integrates with Apple Health to sync weight, steps, and workout data for accurate calorie targets.

0xCal is designed for iPhone users who want effortless calorie tracking with a minimal interface, dark mode design, and native iOS feel. It requires iOS 18.0 or later and offers Apple Health integration along with home screen widgets for quick access.