Product review (5 stars): Nothing better when you want to check the relative humidity and temperature!
<div id="video-block-RSLV1BL3X080B" class="a-section a-spacing-small a-spacing-top-mini video-block"></div><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/A1RZfOo0XmS.mp4" class="video-url"><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/81rbm%2B9Aw5S.png" class="video-slate-img-url">&nbsp;It works and it works very well. When download the Android app, make sure you select "ExView RHT"--there are multiple ExView apps, do be careful. RHT stands for Relative Humidity and Temperature. In the attached video, I've used a Bl smart phone, which is also an Android device. I plugged in the EzSmart Hygro-Thermometer and put it near a Honeywell cool humidifier. As the temperature goes down, the humidity goes up. It works!

The word "hygro" comes from the Greek language: "hugros", meaning 'wet'.