Natural Cycles says contraceptive app is more effective than the pill

Natural Cycles says contraceptive app is more effective than the pill

The app shows users when it’s safe to have unprotected sex (a green day) or when other contraceptive methods such as condoms should be used (a red day) thanks to body temperature readings — after ovulation a rise in progesterone makes women’s bodies up to 0.8 Fahrenheit higher than usual. The app helps women both …