These Period Tracker Apps Say They Put Privacy First. Here’s What We Found.

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If you use an app to track your menstrual cycle, you may enjoy the sometimes spot-on predictions about when your next period is coming. 

your period-tracking app doesn’t just offer insight. It gathers a lot of data about you along the way, too—maybe even more than you know.

Period tracker apps collect deeply personal information that can include how often you have sex, whether you are trying to have a baby, 

When Consumer Reports last evaluated period tracker apps in 2020, our Digital Lab, which tests how well products and services protect consumers’ privacy, 

the five apps we evaluated—which all store users’ data in the cloud—provided no guarantee that this information would not be shared with third parties, even when users thought they were anonymous.