Users of fitness trackers and smart watches, the American manufacturer Fitbit has found that their gadgets can now measure the level of blood oxygen saturation.
Constantly measuring this indicator and evaluating the degree of its variability (a function of SpO2), the device lines Fitbit Versa, Ionic and Charge 3 to identify problems with breathing (e.g., sleep apnea). Schedule variability is shown in the Appendix in the section which grouped the indicators of the quality of sleep:
Interestingly, the sensors for measuring SpO2 was in the devices from the beginning, but has not been activated and software Fitbit was absent. One of the most popular fitness gadgets in the world – Apple Watch – this function does not yet have, but it is in Honor Band 5, 5i, Huawei Band 4 Pro and some smart watches Huami Amazfit.