Insert Coin semifinalist: iOximeter

Pulse oximeters that connect to your smartphone aren't exactly new. In fact, a super-hackable Bluetooth model called smARtPULSE wound up as a finalist in our Insert Coin competition early this year out in San Francisco. What sets the iOximeter apart is its cross-platform compatibility and extremely low power requirements. In fact, it's able to draw all the juice it needs from the headphone jack on your phone. The appropriate data is also transferred over a standard issue audio cable and presented in an app on your iOS or Android device. That leaves you free to charge your phone while watching your the oxygen saturation levels in you blood climb. Data is not only presented in real time, but recorded for later analysis.

You can see all of the Insert Coin semifinalists here.