I have both apps . Glow says my fertile days are 26 feb-4 march. Ovia says 18-23 of feb. B.c I just started af. This month I want to really b.d alot. I have faith this might be my month. What do you guys think. Should I start on the 18 and b.d every other day until the 4 th. ? Has any body have both apps? I put on both I started a.f. today. Just wondering what you ladies would do. Or if I should do one over the other. I also have many ovulate test on when I should take them. Thank u for your input!