Period tracker Stardust shares users’ health data with analytics firm, says Mozilla research

Mozilla research found that the Stardust period-tracking app shared users' sensitive health information (birthdate, birth control type, reproductive goals, symptoms) with third-party analytics provider RudderStack, contradicting the app's prior claims of end-to-end encryption; this raises privacy and security risks since third-party data handling can lead to breaches or legal data requests, while other tested apps like Euki did not share such data.