"Take Temperature" allows you to measure the body temperature by detecting heartbeats: the basic principle is that the two phenomena are correlated.Heart rate is a vital function with personal characteristics, affected by several phenomena; for this "Take Temperature" requires an initial calibration personnel performed at rest and without fever. Then you can measure body temperature approximated for each registered user. You can also periodically update the APP with subsequent new calibrations.
It should be noted that it is not possible to measure with absolute precision fever without a thermometer. This application may NOT in any case, replace the thermometer as a diagnostic tool!