Review on Smart bracelet HUAWEI Band 4 Pro, graphite black by Keisuke Uemura ᠌

I took the bracelet for the sake of interest in order to evaluate the built-in training programs for preparing for races, I myself have been running for a long time, I used purely sports heart rate monitors from Polar all the time, so there is something to compare with the accuracy of heart rate tracking - the optical sensor in any bracelet, of course, will never reach the accuracy of the chest sensor, this must be remembered. So far, the bracelet has only been tested in one workout in the gym and one run - the sensations are mixed. On the one hand, it seems to work, but with a pulse above 140 beats / min, the optical sensor raises serious doubts about the readings, plus the dynamics of the pulse change is very late. I was unpleasantly surprised by the ridiculous logic of the application interface - I turned on the preparation plan for the race, entered all the data, everything was synchronized with the bracelet, now I believe that including the planned workout from the bracelet and after it is synchronized with the phone, I will move forward according to my training plan, but no - training according to the plan must be included in the application, and I do not take my phone with me for a run or to the gym. At this point, everything is somehow ridiculously implemented. I will adapt further, I will add a review if anything.