Thermometers can be pretty invasive: You stick them in your ears, your mouth, and occasionally in other places. Not this one. The Withings Thermos reads your temperature when you place one end on your forehead—that's it. The Withings Thermo takes about two seconds to read your temperature once it's pressed against your forehead. Your body temperature reads out in a dotted LED display. A small light on the front will blink green if your temp is registered as a healthy rate. If you have a fever, a red light flashes notifying that you’re in poor health. The companion app keeps track of your temperature over time, which can come in handy especially when you’re sick. You can also keep a log of any medication that you’re taking in a chronological view, so you know whether your temperature is cooling after taking any health products. The app stores profiles of several people, lasts on 2 AAA batteries for about two years.