I was wondering if it was silly to fully trust <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> about ovulation and fertile days and everything cause if I count on my own when I'm supposed to ovulate (I have a 28day cycle), its yesterday so I should be fertile for a couple of days, but according to this app my fertile window ended yesterday..?