In Contraceptive Tech, the App’s Guess Is as Good as Yours

January 22, 2018

(Wired) – Last year, a small Swedish startup made waves with what it called the world’s first form of “digital contraception.” The company’s product, a smartphone app called Natural Cycles, pairs with a thermometer to track women’s basal temperature every day, then uses that data to make predictions about ovulation. Rather than curbing ovulation, like an oral contraceptive, Natural Cycles gives women either a red light or a green light on unprotected sex depending on when they’re most likely to be ovulating. The app promised a 21st-century update to contraception—one that used algorithms, not hormones; one that lived on an iPhone, not inside of a woman’s body.

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