BLUF:<p>* Follow common privacy tips (browsers, VPNs, etc.)<p>* Take care with what you say if you communicate over anything that could be logged (such as SMS)<p>* Not included, but if you're using an app to track your period, stop. Switch to a moon calendar or a (heavens forbid) IRL whiteboard calendar to track this. Companies already use this data to market products to you at certain times of the month and could detect pregnancies as early as 10 years ago (<a href="https://www.nytimes.com/2012/02/19/magazine/shopping-habits.html" rel="nofollow">https://www.nytimes.com/2012/02/19/magazine/shopping-habits....</a> - apologies for paywall). The data on an app like this is even more reliable.