I received this thermometer free for testing purposes from Influenster. The app is a very useful app and it actually makes me relieved that I can track temperatures and not have to remember what the highest temp that was taken. It is extremely easy to use and/or figure out. I love that there are multiple profiles so that you can remember the whole familys temperatures. I am a mommy and this definitely helps me during the most stressful times which are sick times. With this app I can easily answer the doctors/nurses question easily and accurately about my families symptoms and temperatures. I like when you take a temperature it tell you how severe it is based on the childs age.