Pulse oximeter - incorrect measurements

Mine is giving readings in the 90's about the same as before 4.7

Mine also generally inaccurate approx %4. Pulse OX is may be the only thing that i'm not content with the watch.

Me too - alternative medical SPO2 has me at between 5-10% higher most of the time - one of the main reasons for choosing VA4 so I hope this can be fixed. Be aware def big difference if wear as advised firstly above the wrist. Only just bought the watch so never tried the 4.6

Look at the pictures. Comparison with my colleague's Venu. On the same hand and on my both hands.Always 6% of difference. Is it possible that the sensor is broken?

Exactly the same for me. I'm using firmware 4.80. Pulse Ox is always showing low levels but a finger tip meter shows 99-100%. Vivosmart 4 is always at least 5% less. Seems like the Pulse Ox facility is of no use.

I confirm the problem. I have my va4 for 8 days and I'm always around 89/90%. in fact my doctor check has always returned me 96/98%. Despite this problem, Garmin elevate technology is excellent when monitoring heart rate in training.
Coming from the Fitbit heart rate monitor, the Garmin elevate is on another planet!

Some problem. Garmin oximeter is useless and I've turned off it. 

try galaxy active2/watch3, - more accuracy(HR) 

I think there may be something more going on for 7355084. My Active 2 and VA4 give comparable results.

Same problem here with Marq Captain.

Medical measurement at fingertip is app. 5% higher than Marq Captain shows. Disappointing - such an expensive watch...