even the barometer is not accurate on this watch if the software on the watch is not restarted for more then 1 months or so..still needs stability/reliability updates
I had a venu 2, and for me, the SpO2 was much more accurate than the Samsung Galaxy Watch 3. The Venu was within 1-2% of my clinically certified finger SpO2 meter, while the Samsung, when it would actually measure, would be all over the place, varying as much a 8% either up or down from the certified device. In addition, I also checked the "Health Snapshot" portion of the HRV value against my CorSense device which is a dedicated HRV device used by many colleges and universities in their sports departments. This value was within 1-2 points of the RMSSD value of the CorSense. I'd say Garmin has it right, but a lot depends on how you take your readings.
why venu 2s spo2 not accurate compare other. lower about 3-4%
Reflective measuring which is used in watches has its limits and is less reliable than on-finger where transmissive technology is used. Of course a lot depends on sensors and algorithms used in watch. I have pretty bad experience with Vivoactive 4 but I've heard that it improved a lot in Venu 2 at least from what I've heard so I'm surprised to hear that it's bad for you, also 3-4% isn't that bad, on VA4 my readings can be 20% less than with on-finger device. I used some cheaper devices like Honor Band 4 and they gave readings which has less error margin, so I believe that there could be some problem with algo used by Garmin for taking those readings.
In addition, I also checked the "Health Snapshot" portion of the HRV value against my CorSense device which is a dedicated HRV device used by many colleges and universities in their sports departments. This value was within 1-2 points of the RMSSD value of the CorSense.
I wonder if you were taking HRV measurements with built-in optical HR sensor or using dedicated chest strap? As earlier Garmin was telling that optical sensors aren't reliable enough to provide good HRV readings. If you used optical one that's really cool that accuracy went up in the latest models of their watch.
I'd say Garmin has it right, but a lot depends on how you take your readings.
So true, when we talk about measuring SpO2 I can actually get readings close to what my on-finger device is showing but I have to strap my watch very tightly, to the point I feel discomfort and I can't move at all, there still be error but it would be around 4% instead of 20%.
And surprisingly Honor band could take readings without changing tightness of strap all the time, that's why I said about necessary changes to algorithm which should discard certain readings if they aren't reliable.
I guess that some people may actually have good SpO2 readings simply because watch band fits tightly to their wrist originally and myself I either can fit it to be very tight or being too loose.
