Blood Oxygen Level Q

[TLSA]

Why is this called “low variation”? It seems like there are a lot of spikes in the high range? 

 

[LZeeW]

Hi @TLSA   Unfortunately, no one can answer your question.  We can't do any analysis because there are no numbers on the y-axis of the graph.

I can explain some history behind this.  Fitbit started putting the SpO2 oxygen sensor on models as old as the Ionic (2017).  Measuring SpO2 is a medically regulated feature, so Fitbit couldn't turn it on.  Being able to measure SpO2 became a huge deal in the smartwatch wars.  Fitbit turned on the sensor in 2020 and totally made up this graph, because it still didn't have FDA approval to report SpO2 values.  Fitbit eventually got FDA approval and we can get average sleeping SpO2.  I don't know why numbers were never added to this graph, but it might have required a new FDA submission.