We’re also helping you prioritize your heart health. Atrial fibrillation (AFib) is the world’s most common heart rhythm condition, and since launching the ECG app on Sense, users have taken more than four million assessments. The ECG app will be available soon on Charge 5,4 bringing a critical tool to more people at a more approachable price. Charge 5 also tracks your heart rate 24/7 and provides notifications when you are above or below your personal ranges, and while many factors can affect your heart rate, a high or low heart rate may be an indication of a heart condition that requires medical attention.