I have two fertility/<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period apps</a> that I am using. I'm hoping this will help pinpoint my fertile time better since my boyfriend and I are TTC. Both apps have the exact information in them and I had the same fertile window in them both, but Glow is telling me my period is due March 14 whereas Ovia is telling me March 20. Ugh its so confusing I don't want to test anymore with a BFN so I want to wait until my missed period and yet I'm not sure exactly when I will start.