Smartphone app Natural Cycles, the first app certified as a form of contraception in Europe, is setting its sights on the US next.
Though plenty of cycle-tracking apps exist, most of them don’t get the fertility window right. Natural Cycles uses a specially developed algorithm and other factors, including temperature, to determine which days a woman might be fertile.
The European inspection and certification company Tüv Süd gave Natural Cycles a CE certification in February, which means the app is now considered a medical device for contraception in Europe.
To get the CE certification, the company’s says the app has repeatedly demonstrated in a series of clinical studies that it improves the effectiveness of traditional planning methods.