This scatter plot compares heart-rate measurements from the Huawei Band 10 (y-axis) against the Polar H10 chest strap (x-axis) during a cycling session. Each point represents a timestamped HR sample. The blue regression line closely follows the identity diagonal and the Pearson correlation coefficient is R = 0.98 (p < 2.2e-16) — indicating an extremely strong linear relationship between the two devices. In practical terms, the Band 10 tracks the chest-strap reference very closely across most intensity ranges. A small dispersion appears at some mid-to-high heart-rate values, suggesting minor variability under peak load; however, no systematic large bias is evident.

You will receive more graphs in different situations, like outdoor and gym. You will also get a sleep graph comparing the band with another specialized device. You will not get another explanation right away but you can give me your email and I can send you later.