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The minute you feel those chills and aches you’ll want to whip out the thermometer to find out if you’re feverish. After all, a fever could mean the flu, or that you’re contagious. Thermometers have always been a handy health gadget, but they’ve also gone through major upgrades since we were kids. We’ve compiled a list of our favorites so that you can keep track of where you stand.

Versatile: iProven Medical Thermometer, Oral & Rectal Thermometer

This is your traditional, bare-bones oral thermometer. There are no frills, but it’s effective; just place the device under your tongue and it will display your temperature. You can even move between Fahrenheit and Celsius. Simple.

Easy to use: Braun Thermoscan 7 Digital Ear Thermometer

The Braun Digital Ear Thermometer is a straightforward stick-it-in-your-ear thermometer that many of us remember from trips to the school nurse. Measuring infrared heat, this thermometer finds an accurate reading for yourself or your loved one.

Most advanced: Withings Thermo – Smart Temporal Thermometer

The Withings Thermo automatically syncs to your smartphone, keeping track of your information for you. It also boasts a color LED strip that lets you know at a glance if your temperature is higher than normal. It can hold information for up to 8 users and its 16 infrared sensors can take up to 4,000 measurements to get a more accurate reading. It measures the heat coming from your forehead, so there’s little-to-no actual contact with bodily fluids.

Smarter option: Kinsa Smart Thermometer for Fever

With a corresponding app, this thermometer does more than measure and track your temperature. It collects your symptoms, and let’s you know when it’s time to see a doctor. This thermometer takes body temperature in a number of locations including via mouth and underarm.