What is your favorite <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> to use? I've been using Fertility Friend and Ovia - this month I added Glow and Kindara. It's too much... What app is more accurate? FF said I ovulated on 12/30 and should've started Monday. The others say 1/2 and start tomorrow. Pregnancy test have been negative. Suggestions?