A: On the application that you get you can change it to show the temperature in Fahrenheit (f) or Celsius (c)
A: Yes. You can change it from F to C by pressing the ON/OFF button on the thermometer twice while the thermometer is turned on. You can also change it in the app. Click on the “Menu” icon and select the “Settings” icon. An icon will be displayed to indicate which mode the thermometer is in. Touch the icon to switch modes.
A: The average normal body temperature is generally accepted as 98.6°F (37°C). Some studies have shown that the "normal" body temperature can have a wide range, from 97°F (36.1°C) to 99°F (37.2°C). A temperature over 100.4°F (38°C) most often means you have a fever caused by an infection or illness.
A: Yes - the app is compatible with both iPhones and Androids.
A: It does not need lens filters.
A: You need to place it properly but I find it easy to do on myself