What did Premom do with user data

The FTC took enforcement action against Premom's developer Easy Healthcare in 2023. The FTC alleged that Premom shared users' health data, including ovulation tracking information, with Chinese analytics firms Umeng and Jiguang without user consent. This was particularly notable given concerns about data handling by Chinese technology companies.

What is Spot On and is it private

Spot On is a period and birth control tracker from Planned Parenthood. It is free with no ads and has not faced FTC enforcement actions. However, Spot On stores data server-side and requires account creation, so it carries the same subpoena risk as other server-based trackers. Planned Parenthood's data handling practices are HIPAA-informed, but HIPAA covers healthcare providers rather than apps, and HIPAA compliance does not prevent law enforcement access.

Does Clue sell period data

Clue has not faced FTC enforcement for selling user health data. Clue is Berlin-based, GDPR-compliant, and operates without an ad-supported model. Clue does share data with research partners in specific, consented contexts. Clue's commercial privacy practices are notably better than Flo or Premom. The structural limitation is that data is server-based and technically accessible via legal process regardless of GDPR.

comparisons

Flo, Clue, Natural Cycles Ranked by Privacy (2026)

We ranked 10 period trackers by data architecture. Flo's $59.5M settlement, Premom's FTC action, and the 3 apps that keep data on your phone.

How this ranking works Privacy in period trackers comes down to two variables: data architecture and enforcement history. Architecture is the structural question: does data live on your device only, or on company servers On device data cannot be subpoenaed because there is no server to serve. Server based data can be compelled by a court, regardless of the company's privacy policy. Enforcement history is the track record: has the company been found to have violated its own privacy promises FTC enforcement actions are public record. The ranking below goes from worst to best. Ranked worst to best: privacy 1. Flo (worst): FTC enforcement action 2021 for sharing health data with Facebook and Google. $59.5M class action settled September 2025 (Reuters 2025 09 25). Anonymous Mode is a paid feature that doesn't change the server based architecture. Jury found Meta liable for accessing Flo user data (Frasco v. Flo Health, August 2025). 2. Premom: FTC enforcement 2023 for sharing health data with Umeng and Jiguang (Chinese analytics firms) without consent. Server based with account requirement. 3. Glow: Ad supported model with server based storage. No documented FTC enforcement, but the ad