The Microsoft Band is a wrist-worn fitness tracker designed for people who want to track data from their workouts while also having email, texts and other reminders available with a glance to their arm. The GPS-enabled device tracks your heart rate, steps taken, calories burned and the quality of your sleep, and also offers a guided workout feature. It pairs with the Microsoft Health app, which runs on iPhone, Android or Windows phones. At $199.99, the Band is more expensive than the Withings Pulse 02 and the Fitbit Charge HR , which also track heart rate and cost about $120 and $150, respectively. But Band’s cost is comparable to the Adidas miCoach Fit Smart (about $190 on Amazon), which also has a built-in heart rate monitor, but does not alert you about emails or texts. What sets the Band apart from other fitness trackers is its smartwatch capabilities— email, texts and calendar alerts (as well as the digital personal assistant program called Cortana, which is available on Windows phones).