We got this themometer to use on our daughter so that we did not have to do it that other way. It come up with differnt temp everytime we take her temp. I have to do it 6 time just to see that it's her real temp. But it's still wrong, when my daughter was not feeling well and I know she was sick. I use this MOBI on her a it tells me that she does not have a temp, so I did it that other way and she had a temp of 102.( at the time she was 3 months old). Go a head any buy this if we want mix readings.