If you want a smart pulse oximeter, the iHealth Air Pulse Oximeter can link to iHealth’s smartphone app, to which it transmits readings via Bluetooth. (The iHealth MyVitals app, available for iOS and Android, connects to several iHealth devices, including the pulse oximeter, a wireless scale, and a blood pressure monitor. Although we’ve toyed with the app, we haven’t thoroughly tested it.) This pulse oximeter was the sleekest and most sophisticated-looking pulse oximeter we tested; it’s a monochrome white when off. The horizontal screen turns on when you press a button, displaying your SpO2 on the left, your pulse rate on the right, and a pulsating up-and-down bar in the middle to indicate the signal strength. All words, numbers, and symbols light up in green. Depending on the amount of lighting in the room, we found that the display could be hard to read. The iHealth device received FDA clearance, but this model is not as easy to use as our picks. It charges only via USB and comes with only a USB charging cord (most fingertip pulse oximeters rely on AAA batteries and don’t require regular charging).
