In May 2025, Mozilla announced that it was shutting down the popular read-it-later app Pocket, which it had acquired back in 2017 for an undisclosed amount. That led to a growing demand for alternative apps that could help people save online content, particularly longer articles, that they want to read later when they have more
“Your data is private. Period,” period tracker Stardust says on its website. As new research from Mozilla found, some users may find that claim overstated. According to Mozilla’s latest findings examining the privacy practices of period tracking apps, Stardust was found to be sharing users’ sensitive health information with third-party analytics company RudderStack. This data