A recent New Zealand study shows that millions using period-tracking apps may not fully understand the privacy implications of sharing sensitive health information. The findings come as global focus on reproductive data surveillance intensifies following the 2022 reversal of Roe v. Wade.
Period Apps Collect More Than Menstrual Data
Period apps today do far more than just track menstruation. Many encourage users to log information on sexual activity, medications, emotional states, sleep patterns, and even social interactions.
Some apps sync with wearable devices like the Oura smart ring or Apple Health, further expanding the data footprint. As one participant in the study reflected, “there’s no such thing as private data these days.”
The said period apps have become indispensable for many users managing menstrual health or planning pregnancies. However, that convenience comes with a hidden cost — often, users do not fully understand what information they are giving away or how it might be used.
Researchers Highlight Data Sharing Beyond Privacy Policies
A recent analysis cited by the researchers found that “many period apps exported more data than was declared in privacy policies.” It includes the data shared with commercial and research entities — often without users’ explicit knowledge or consent.
Period app Flo settled with the U.S. Federal Trade Commission in 2021 for sharing user data with marketing and analytics firms, despite assurances of privacy.
Apps’ Data Use Raises Global Legal Concerns
Apps’ ability to infer pregnancies through data patterns poses serious privacy risks in countries banning abortion, where law enforcement access could lead to prosecutions. Although abortion laws in New Zealand remain unchanged, some users expressed anxiety. “I worry for all users about what this information can be used for in future,” said one participant, citing fears of political spillover from overseas.
New Zealand Users Show Mixed Attitudes Towards Data Risks
The study found a range of responses from New Zealand app users. About half were unconcerned or optimistic, believing their data could help improve health outcomes. Others limited the information they entered or felt resigned to the risks.
One participant referenced Māori concepts of autonomy and sovereignty, saying: “I don’t have full control or rangatiratanga over the data I provide.”
While researchers advocate for informed consent and data protections, they also stress that users shouldn’t have to choose between health insights and privacy. “Menstruators shouldn’t have to trade data privacy and security in order to access the benefits of period-tracking apps.”