While the thermometer works, there is NOTHING in the manual that tells you how to change from Celsius to Fahrenheit! Only with the smartphone app can you see Fahrenheit!
There is nothing in the manual that tells you how to pair this thermometer with your phone nor do they tell you the pair code! Pathetic! In the end, you don't need it and the manual doesn't tell you that either.
I also get significantly different readings just minutes apart.