Review on Smart bracelet Xiaomi Mi Band 3 Global, black by Virot Rongrot ᠌

Pulse measurement. At rest, sitting on a chair, they show the heart rate correctly (measured 22 times in a row, 11 times with a finger and a watch, 11 with this device, alternating these 2 methods). Experiment result: bracelet: average heart rate 72.45 (69-78) "manual" method: average heart rate 73.63 (70-76) The difference is 1.5%, which is within the statistical error. But the spread of 9 contractions when measured with a device versus 6 when measured manually hints at inaccuracy. When measured while walking and other physical activity (not very intense): - in some cases does not measure at all - in another part shows obvious nonsense - in the third part, the results are plausible, but how much they correspond to reality, one can only guess. As a watch, the device is not particularly convenient: even in cloudy weather it is not very readable, you can hardly see anything in the sun. In addition, in order to see the time, you need to make a certain movement with your hand or press a button, so a "normal" wrist watch does its job much better. The interface of the Mi Fit application, which is necessary for the operation of the bracelet, is not very convenient and not very intuitive, even with the help of the Internet it is not easy to understand everything. People with an IQ<80 (like me) may have trouble using the device. The problem is partially solved by installing the Master for Mi Band application, where the interface is more humane than in Mi Fit. The "notification of exceeding the set heart rate mark" function could not be activated even through the Master for Mi Band, although, given the accuracy of the measurements, it still does not make sense.