Flo vs Premom 2026: Privacy, Features & Price Compared

Flo and Premom serve overlapping but different audiences. Flo is a general-purpose period and health tracker — the most popular in the world with 440 million users. Premom is focused specifically on fertility, popular in the trying-to-conceive (TTC) community for its ability to photograph and analyze ovulation prediction kit (OPK) test strips.

Flo offers breadth: 70+ symptoms, health chatbot, community forums, pregnancy content, and articles from medical experts. Premom offers a focused fertility toolkit: OPK strip reading, BBT charting, and cycle predictions designed for users actively trying to get pregnant.

What they unfortunately share is a history of privacy violations. Both apps have been subject to federal enforcement actions for sharing reproductive health data without user consent. For users choosing between them, the most important feature isn't in either app — it's whether your fertility data stays private.

Flo and Premom represent the two most documented cases of period/fertility app privacy failure in the United States.

Flo's violations span years. The FTC found Flo shared menstrual data with Google, Facebook, and Flurry Analytics in 2021. A $56M class action settlement followed in 2025, with Google paying $48M and Flo paying $8M. A California jury found Meta guilty of eavesdropping on Flo users' data.

Premom's violations are arguably more alarming because of where the data went. In May 2023, the FTC charged Premom's developer, Easy Healthcare, with sharing fertility data — including ovulation test results — with Google, AppsFlyer, and critically, two China-based firms: Umeng (Alibaba subsidiary) and Jiguang (Aurora Mobile). The data sharing was undisclosed, and Easy Healthcare violated the Health Breach Notification Rule by failing to notify users.

Both apps now operate under federal consent orders. But the architectural vulnerability remains: both store data in the cloud, both require accounts, and both have proven willing to share data with third parties.

PinkyBloom eliminates the entire category of risk. On-device-only storage means there is nothing to share, no matter what a company decides to do with its analytics partnerships. Your fertility data exists on your iPhone and nowhere else.

Flo's feature set is broader: AI chatbot, 70+ symptoms, community forums, pregnancy mode, and thousands of articles. It's a health platform, not just a tracker.

Premom's standout feature is its OPK test strip reader — photograph an ovulation test strip and get an AI-powered reading. For the TTC community, this is genuinely useful and reduces guesswork in interpreting faint lines. Beyond OPK reading, Premom offers BBT charting and basic cycle predictions.

PinkyBloom doesn't offer OPK strip photography, but it surpasses both apps in every other dimension. On-device AI provides conversational health assistance and multi-symptom analysis. Voice logging means you can say "positive OPK today" instead of navigating app menus. AI mood forecasts predict emotional patterns. The doctor visit report generator creates professional summaries for fertility consultations — a feature neither Flo nor Premom offers.

Both Flo and Premom charge approximately $49.99/year for premium features. Both have ad-supported free tiers. Over five years, either app costs roughly $250 — for apps that have been caught sharing your fertility data with third parties.

PinkyBloom is free forever. Every feature included, no ads, no premium tier. The five-year cost is $0. For the TTC community, where users track their most sensitive fertility data daily, the combination of better features, proven privacy, and zero cost makes PinkyBloom the clear choice.