Meet Fitbit Sense, the advanced health smartwatch that helps you tune in to your body and guides you toward better health. Assess your heart for atrial fibrillation (Afib) with a compatible ECG app right on your wrist, track & manage stress, better understand your sleep quality and even keep an eye on patterns in your skin temperature. Plus, Sense unlocks a 6-month Premium membership for new users which includes personalized tools like Daily Readiness—so you can do what’s best for your body.