Question

Does the sleep apnea feature detect signs of sleep apnea based on Samsung Health's Blood Oxygen?

Answer

No, the Sleep apnea feature has nothing to do with Samsung Health's Blood Oxygen. Blood oxygen is a wellness feature, and the Sleep apnea feature is a medical device. The Sleep apnea feature has its own, independent algorithm to detect signs of sleep apnea. The Sleep apnea feature analyze blood oxygen saturation per second and track how many relative decreases in blood oyxgen you have during sleep to detect signs of sleep apnea, while Samsung Health's blood oxygen displays the minimum value of blood oxygen saturation per minute during sleep.