I am someone who wears my fitbit 98% of the day everyday, been using Fitbit for about 2 years now. Yet looking up the SPO2 is like looking up lottery ticket numbers, it works when it feels like it. I wake up every morning, refresh my fitbit app twice, to sync the data, spend another 5-10 minutes getting out of bed, then plug my fitbit to charge while I shower for 10 to 15 minutes. Fitbit SPO2 doesn't like that at all. Somedays it will decide it wants to show my SPO2, some days it won't. Had the same issue with Sense, and now noticing it on Sense 2. Keep thinking it will eventually get updated or fixed by Fitbit, but after using Fitbit Sense 2 for last few days, highly doubtful that this and along with other multiple issues will get resolved. Sense 2 already seems like a downgrade from Sense.
