Analysis: Nine of 20 popular period tracking apps use data for third party ads

A study by Surfshark found that nearly half of period-tracking apps studied used or shared data for third-party advertising. The analysis ranked Eve, Glow, and Ovia highest in how much potentially sensitive data they collect, while Apple’s Cycle Tracking and the Life app ranked the lowest. The study suggests that much of this data is not necessary for the apps to function.