Inner ear format or forehead?

Tonnie has a 2 year-old & a 4 year-old boys. She thinks both infrared ear & forehead modes have their advantages. In her experience, she used mostly infrared ear when her boys were small because it will not be affected by external factors, so a higher accuracy can be expected. But when her boys grew up to go to school, she started to use a forehead theremometer to do daily temperature check before school. Both kinds of thermometers serve in different situations.