Lumen is a revolutionary iPhone application that allows you to take control of your metabolism and live a healthier lifestyle. Developed by Meta Flow Ltd, this free app is the world's first device to measure your body's fat and carb burning capacity in a single breath. Lumen's personalized metabolic coach provides real-time metabolic insights, tailored daily nutrition plans, and recommendations on what to eat and when. The app also includes customizable tracks to achieve your goals, progress tracking, and a monthly cycle tracker. With Lumen, you'll have access to a community for support and discussions, and the app integrates with Health apps to sync data on your activity and sleep. Lumen offers different plans designed to fit your unique goals, whether it's weight loss, fitness performance, or improving your metabolic health.