If we had to recommend you to download the best thermometer application for Android, we would neer suggest you download the APK of Professional thermometer. Mainly because it isn't accurate enough and it shows us adverts every step we take.
A thermometer that we don't really need to use
But if you're into installing stupid applications on your phone and then you don't know why your browser keeps showing silly adverts and your operating system is slower than hell, don't hesitate to download this app.
Well, it's meant to show you the temperature in Celsius or Fahrenheit on a thermometer the color of which you can change depending on whether it's warm or cool: dark blue when it starts getting chilly and bright red when the temperature is similar to that on Mercury.
All in all, you can spare downloading this app, you're better off searching for an alternative amongst the different applications to measure the temperature on Android