There is no certainty in what I am saying, but I can say that it is certain that I can’t give you measurements on the same day for sure. It is physically impossible to do that having one o2ring, so the next best thing is to infer that when I took sleep data on 6 successive nights, I am likely to have readings that are consistent with my condition, and if one set should measure one way, the other should not stray far.
I’m done with my testing anyway, and if the SAA plus o2ring add-on plus sleepcloud is not displaying my spO2 correctly, I can just use the ViHealth app separately using another phone concurrently with SAA on another phone. It is slightly more work and bothersome, but I can’t have my sleep app giving me wrong graphs. If I’m having very low spO2 and the Sleepcloud graph isn’t displaying it as it should, that isn’t helping my health at all, is it?
But that is just me. Other users may feel perfectly fine with the way data is parsed.
I will try again setting the o2ring to collect data every second as your suggested, but I don’t necessarily agree with that approach as it’s very taxing on the o2ring. Won’t it wear out 10x as fast from its current default 10-second interval in the add-on? Won’t a 4-second sampling interval be okay as that would match the fixed sampling interval of the ViHealth app?