I have PCOS and I started using this app in 2015 when I was TTC baby number 1 after 1 month of using this app I became pregnant. Now I've been ttc baby number 2 for 12 months this month. well I'm pleased and happy to say after downloading this app again last month or maybe October (I don't remember) I got my BFP Wednesday and AF was supposed to show this coming Monday. I'm happy she going on vacation. baby dust to all.