I use the Natural Cycles and Flo apps (plus, Apple Health & WomanLog!), and they've always been "accurate" in line with the ovulation test kits I've used. However, this month feels different. I'm supposed to be at my most fertile right now, but the tests are showing otherwise 😢 I did start my last period one week early, which I’ve logged in the app too, and my body temperature has increased over the last couple of days.