The app, which has roughly 700,000 users worldwide, has been blamed in Sweden for causing multiple unwanted pregnancies.
A contraceptive app called Natural Cycles has been receiving complaints after 37 women claimed it caused unwanted pregnancies.
The app, which uses an algorithm and factors like body temperature to predict when a woman will be most fertile, has been a popular alternative to hormonal contraceptives in the EU, where it is certified as a form of birth control.
Users take their temperature on a daily basis using a special thermometer and enter the readings into the app. The app then lets the user know whether or not they are fertile on that day. In addition to being hormone-free, the app also appeals to users as it claims to offer no side effects whatsoever.