1st: having to give a star for this crap is one star too many for this useless thermometer! took temperature 5 times in a row and got completely different results each time ranging from 95.9 to 98.7 and all that within 15 minutes. I then used a classic mercury thermometer twice in a row and both times I got 98.9. If a fever thermometer cannot give you accurate readings well then its just useless, plain and simple, no matter how nice the app is; the thermometer does not work. after reading all the wonderful reviews on here I thought that maybe my thermometer had been broken so I returned it and purchased a new one. The same happened. I just took my temperature orally 5 times in a row again. Every reading was completely different. I got temperatures from 97. 5 too 100.8. (!!) I honestly do not understand these good reviews of the product. It is totally inaccurate and 100% useless. Sure, the app is nice and shiny and looks good but what good is that if youre trying to find out whether youve got a fever or not and instead of an accurate reading you get some random readings that have nothing to do with your actual body temperature. Very, very frustrating. Advice: DONT BUY THIS PIECE OF CRAP FOR IT IS A WASTE OF $ and time with a dash of extra annoying. FEEL BETTER YALL !