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

Name: Smart bracelet Xiaomi Mi Band 3 Global, black
Item: Smart bracelet Xiaomi Mi Band 3 Global, black
Rating: 3

April 13, 2023

Normal quality, you can use it.

The pulse in such devices is measured by means of an optical sensor. I don’t think that in this way it is possible to more or less accurately measure the pulse, so the inability of the device to cope with this task is most likely not a shortcoming of this particular device, but of fitness bracelets in general. And since sleep monitoring is based, apparently, on measuring the pulse, then it is useless.
And measuring the level of oxygen in the blood with a wrist bracelet is, in my opinion, just ridiculous! Moreover, it is not easy to check the accuracy of such measurements.
I didn’t try to measure the distance, but, obviously, any phone can cope with this task at least no worse, except that you don’t need to keep the phone in your pocket all the time. So that here the device is almost useless.
Conclusion: the device is suitable only as a vibration alarm, which is incomparably better than conventional "sound" alarms, as well as a "vibration notification" about calls and other events, but all this can be found in cheaper models, I see no reason to overpay for non-working functions.

Pros

Vibration notifications about calls and other events and a vibrating alarm clock are, of course, extremely useful things, but they are also found in other, cheaper bracelets.

Cons

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.