The Jawbone UP 24 works in conjunction with the the UP fitness application using Bluetooth(R) technology, to track calories burned & activity intensity, food & drink intake & hours slept. The UP app's Insight Engine ties information all together to help the user find hidden connections between eating, sleeping & activity. Only the UP system has Smart Coach. It's like a partner in fitness - an intelligent guide that helps you make at least one healthy choice every day. Smart Coach goes well beyond delivering measurements to show you the meaning behind the numbers. Improve the quality of your days and nights through a deeper understanding of how your diet, sleep, activity and the choices you make affect your health and well-being. Whether you're training for a big event or just want to get a few more steps into your routine, UP pushes you to reach your fitness goals with streaks, milestones, idle alerts and more. And because UP is designed around human nature, it knows when to push and when to lay off. Set goals, log your meals and use food score to get the information you need to improve your diet and reach your ideal weight. The way you feel is directly related to how well you sleep. Let UP help you make small adjustments to your routine. Once you're getting the right amount of sleep and in the healthy zone for light, deep and REM sleep, you may just find you have a whole new lease on life.