Meet the Kenek Edge: a compact device that turns your iPhone into a pulse oximeter. It has a companion app that tracks your Sp02 and heart rate data. Its clinical-grade fingertip pulse oximeter sensor provides you with accurate data. You don’t need a battery to use this device. In fact, it connects to your phone’s headphone jack, so it is possible to charge your phone and use this at the same time. The companion app supports a customized user profile, history, graphs, and more.
The device works with iPhone 4, 4S, 5, 5C, 5S, iPad 2, 3, Air, Mini, Mini Retina, and iPod Touch 5. Sets you back under $45 at this time.