So, we are ttc for over 8 months. (Paying more attention, logging, testing etc. for the last 4 months) I have glow, Ovia and fertility friend apps. Ovia has fertile window way later and longer. FF is in the middle and glow has it 3-4 days sooner. I've logged the same info on all 3. Periods seem to be close to the same on all 3. Anyone have any ideas? I'm trying to figure what one to follow (although trying to have sex as much as possible on all "Green Day's".) Thanks ladies!