I don't think it's a good idea to use this app anymore. My fertility window has changed for the 3rd time so how can I trust this to be accurate. Gotta find another app to use . It went from the 18-24 then changed to the 12-18 now it's saying from the 21- today. Smh this makes trying more hard and with this I'm never gonna get it right. Anyone know another good app to use?