So, my husband and I have been trying to conceive for almost 3 months. We have had sex on almost all the days we were "supposed" to, but this past month I got my period and when I checked the previous month's calendar my green days had changed from what I originally thought they were, meaning we had sex on all the "wrong" dates! I checked the month before that as well, and it was the same thing-glow "changed its mind". I know that an app can't be completely 100% accurate, but I would think since it knows my average cycle lengths/days it would get it a little bit closer than it has been. Now I am going to be taking ovulation tests during my next cycle to see just how off it is. Has anyone else had this issue with Glow?