0xCal is an AI calorie tracker designed specifically for iPhone users that revolutionizes food logging through artificial intelligence. The app eliminates tedious manual calorie counting by leveraging advanced AI technology to make tracking effortless and accurate.

The app features gram, an AI nutrition assistant that instantly calculates calories, carbs, protein, and fats when you describe what you ate naturally. Users can snap photos of meals or scan nutrition labels for instant analysis, with AI recognizing foods and packaging to extract nutritional data. The chat interface allows natural language descriptions without searching through databases, and personalized plans create custom calorie budgets based on health data and goals including weight loss, maintenance, or gain options.

0xCal works by combining multiple AI-powered input methods - users can either take photos of their food, scan nutrition labels, or describe meals naturally through chat. The AI processes these inputs to automatically calculate nutritional information, eliminating the need for manual database searches. The system becomes more accurate with more specific descriptions from users.

The app provides smart insights and tracking capabilities including daily calorie, carb, protein, and fat monitoring, weekly and monthly success rate tracking, weight history visualization with charts, and step and activity level monitoring. It integrates seamlessly with Apple Health to import weight, steps, and workout data for accurate calorie targets, and offers gentle reminders and home screen widgets for quick access.

0xCal targets iPhone users interested in health and fitness who want a modern, minimal interface for calorie tracking. The app requires iOS 18.0 or later and offers Apple Health integration for comprehensive health data synchronization.