“…There are devices ranges [ 10 , 26 ]: Expensive devices with high accuracy sensors, principally used for healthcare purposes, for instance, include the Emphatica E4 [ 11 , 13 , 28 , 31 ]. Medium range devices with precise sensors have more extensive use, targeted to high-performance athletes, mainly for fitness and sports, and these include, for example, Garmin and Microsoft Band [ 10 , 12 , 32 , 33 ]. Affordable devices for all audiences are used for general purposes, for instance, the Xiaomi Mi Band [ 10 , 34 , 35 , 36 , 37 ].…”