I don't get it, I've tracked my period for months... thought this would be the month but of course not. This app and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> are always accurate on my period so I thought to take a shot for all my fertile days.. I did .. now my period was suppose to come Wednesday.. got it today , subtracted the days from when I supposedly ovualatef and I had sex on that exact day 😩😔