This app claims to let users monitor SpO2 levels and pulse rate with your smartphone: Here's how it works | Tech News
ScanWatch - Understanding my SpO2 measurement results – Withings | Support
Smart Fingertip Pulse Oximeter with iPhone App
FORA O2 SpO2 BLE Fingertip Pulse Oximeter, App Based Sleep Apnea Test – ForaCare Inc.
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Essential Wireless Fingertip Pulse Oximeter$49.99 - A&D Medical
Air Pulse Oximeter | iHealth – iHealth Labs Inc
Amazon.com: iHealth AIR Rechargeable Fingertip Pulse Oximeter, Blood Oxygen Saturation Monitor with App, SpO2, Pulse Rate, Plethysmograph, and Perfusion Index : Health & Household
Track Your SpO2 to Uncover Changes in Your Wellbeing - Fitbit Blog
Wellue Pulse Oximeter with Bluetooth and Free App,Fingertip Oxygen Saturation Monitor with Battery and Lanyard for Home Use,FS20F White - Walmart.com