Pick: Scanadu Scout
Scott Jung, Senior Editor at Medgadget.com has a gadget for keeping track of your health with a tricorder-like device. It's called the Scanadu Scout, and you simply hold it against your forehead for 30 seconds. It will measure your body temperature, blood pressure, blood oxygen saturation, heart rate, and a visual representation of the electrical activity in your heart (or an ECG).
These measurements are important to gauge your overall health, and the Scanadu Scout app can track trends in these measurements and alert you when any of these are out of range. For more information on the Scout and how you can get one, check out scanadu.com/scout.