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Is It Safe to Use a Period Tracker After Roe v. Wade

After Dobbs, period tracker data can be subpoenaed. Which apps are safe, which aren't, and what on-device storage actually protects you from.

Why Roe v. Wade Changed the Risk Calculus Before the Supreme Court's 2022 Dobbs decision, period tracker privacy was primarily a consumer data protection issue: advertising, data brokers, and app revenue models. After Dobbs, it became a legal safety issue. When abortion is criminalized at the state level, evidence of a pregnancy, its beginning or its end, can become relevant to a criminal investigation. Period trackers record exactly this kind of information. Apps that hold this data on their servers can be subpoenaed. Most period tracker users in restrictive states will never face prosecution. The risk is structural: where data is stored determines whether it can be obtained, and that exposure exists regardless of how likely any individual prosecution is. The Two Categories of Apps Cloud based apps (Flo, Clue, Natural Cycles, Glow, Ovia, Stardust) store cycle data on company servers. When you log a period, a pregnancy, or a missed cycle, that information travels to a server the company controls. A prosecutor with a valid court order can require the company to produce that data. Flo's Anonymous Mode attempts to decouple cycle data from user identity, but the data still reaches Flo'