This is the best thermometer we have found. We have tried a rectal, temporal, and ear. I am an obsessive temperature checker. This one is quick and simple. I love that the app keeps track for me in case our pediatrician asks. It’s a very reliable thermometer. It is easy to read and takes the temperature quickly. The smiley face indicator is a great quick reminder whether the temperature is good or worrisome! The app is awesome!