We need information. To resume our normal lives, we need to know the danger imposed by our activities to us and to others. One reliable way to check how you are feeling is your temperature, usually a good indicator that something is wrong. Sure it seems one can transmit while showing no symptoms, but people typically don't check their temperature if they feel fine (except hypochondriacs). However, it makes sense to take your temperature every day as it takes very little time, and one can determine your baseline and/or variance from that baseline. Now, imagine if everyone did it??? Kinsa is trying to use big data to analyze changes in temperature to predict hotspots. In fact, they have created a map to identify issues before anyone even knows there is an issue. Information is power. As an aside, I also use an app to report test results and symptoms called the COVID Symptom Study. This app was created by Mass General Hospital and has over 4mm people contributing data for the collective good.
