Can Your Smartphone Measure Temperature Like a Thermometer?

The short answer is: Yes.

I love my Google Home Indoor Thermometer because it can be used to measure temperature without the need for a battery. But what if I forget to charge it?

The answer is simple: there are now apps for smartphones that can measure temperature. These apps might not be as accurate as a regular thermometer, but they do come in handy when you’re at home and don’t want to go out to, say, for example, buy batteries. Here’s how to use an app-based thermometer.

How to use an app-based thermometer

The way app-based thermometers work is by using your phone’s camera to measure the temperature of a person or object. The apps usually have a range of about 10 degrees Celsius and are very easy to use!

To start, you need to calibrate the thermometer by holding it next to a reliable thermometer or measuring with a glass of ice water or boiling water. This will give the app an idea of what temperature should be measured at.

Now, just hold your phone up to measure a person’s temperature, for example, and the phone will show the temperature in Fahrenheit and Celsius. It might not be as accurate as a regular thermometer but still can come in handy when you don’t have batteries on hand.

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What are the best apps for measuring temperature?

If you’re looking for an app that can accurately measure temperature, then you’ll need to look at the following apps.

1) Thermometer Free by iDroid – this is a free app that can be downloaded on Google Play and iTunes. It’s a simple and easy-to-use thermometer.

2) FeverCheck – this is a free app that you can download on Google Play or iTunes. It helps parents monitor their kids’ temperature and gives them peace of mind knowing whether the fever is going up or down.

3) Ear Farenheit – this is also a free app that can be downloaded from Google Play or iTunes. It’s more accurate than taking your temperature by mouth, but it still needs to be calibrated before use.

4) SmartTemp – this app costs $5 on Apple Store and $4 on Google Play, but it has all kinds of extras like graphs and charts that make monitoring your temperature even easier!

The Downsides of App-Based Thermometers

While app-based thermometers are useful, they do have some downsides. For example, these thermometers don’t give as accurate a reading as a regular thermometer. You might be able to tell if you’re sick, but as for the exact temperature of your illness? It’s hard to say.

Another downside is that many of these thermometers won’t work offline. This means if your phone is out of charge or without service, then it will be difficult to measure your temperature.

The upside: some app-based thermometers can double as a pedometer and altimeter, making it easier for you to keep track of your activity levels and altitude climb. This means that if you’re burning calories with every step you take or climbing up stairs in an office building, then this type of thermometer can help you keep track.


There are plenty of apps that can measure temperature like a thermometer, but there are also drawbacks to using this method. If you’re looking for an accurate way to measure temperature, you’ll want to invest in a thermometer instead.

Erica Cowell

Whenever she finds time away from surfing (waves, that is!), Erica loves to write. Self proclaimed geek (and a nerd), you can find her trying out new kitchen gizoms. Chief kitchen editor at, right now Erica is based out of small but beautiful & sunny Southern California beach town where she grew up surfing. Reach her at