Kinsa's pediatrician-recommended fast & reliable Smart Stick thermometer. The free app records fevers, symptoms, medication dosages, and other important health data in a time-stamped log. The thermometer takes accurate oral and underarm temperature readings - as well as rectal readings when using as a baby thermometer - and its battery-free design means it never dies when you need it most.
This is a nice thermometer! Comes with an extension cord to make things easier when needed. The App for Android keeps track of you and your family's temperatures, and offers advice for dealing with fevers.