Fitbit is rolling out an ECG app to the Charge 5

Fitbit released its Charge 5 fitness tracker with a brand new design and a color screen in September, but it launched without two key software features: an electrocardiogram (ECG) app and Fitbit’s new Daily Readiness Score, which recommends how hard you should work out. More than a month after the Charge 5’s release, those features are now rolling out.