I teach Health Science – Vigor SpO2 | Pulse Oximeter for Sleep Apnea, Asthma, and Blood Pressure Review

And I use this to illustrate "fake science" The app FYI is just a scam not a real algorithm
Review by Retired in Asheville on Vigor SpO2 | Pulse Oximeter for Sleep Apnea, Asthma, and Blood Pressure.