Fitbit Sense Advanced Smartwatch with Tools for Heart Health, GPS, Stress Management and Skin Temperature Trends FB512BKBK at the best last price in Kigali | Rwanda. 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 AFib right from your wrist, detect and manage stress, better understand your sleep quality and even keep an eye on patterns in your skin temperature or well-being with SpO2. Plus, Sense unlocks a 6-month free trial of personalized guidance and advanced insights for new Fitbit Premium users.