When I decide to track something new, and a couple of days have passed, I see it pop up in impacts, with wildly inaccurate correlations that are very obviously caused by the fact that the app counts every single day I have not tracked that factor or symptom as a day WITHOUT that factor or symptom. This means that the longer you’ve used the app, the more useless adding new things to track becomes if you are looking for correlations. I know some people have asked to make the standard as “none” but in my experience, this is already the case when it comes to all the statistics. At least make an option to start tracking x symptom/factor “from NOW on”when adding a new one. It would be so helpful, solving this problem and many related ones.