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Flo

Period and cycle tracking app that settled with the US FTC in 2021 over sharing health data with third parties despite promising not to

As of 1 September 2026, Flo is free to use. A menstrual cycle, fertility and pregnancy tracking app that logs sensitive reproductive health data and, in 2021, settled with the US Federal Trade Commission over allegations it shared health information with Facebook, Google and other third parties despite telling users that data would be kept private. Softwr lists it under Healthcare. Flo is made by Flo Health Inc, available on iOS, Android, Web.

Overview

What Flo does

Flo tracks menstrual cycles, ovulation predictions, symptoms and, for users trying to conceive or pregnant, pregnancy progress, using logged symptom and cycle data to generate predictions and health content. The free tier covers core cycle tracking and predictions; Flo Premium, commonly priced around $11.99 a month or roughly $59.99 to $99.99 a year or with a lifetime option, adds deeper health insights, expert content and personalised reports. The fact that has to be central to this entry is the 2021 FTC settlement. The Federal Trade Commission alleged that Flo Health had promised to keep users health data private while actually sharing sensitive information, including details about pregnancy and menstruation, with third party analytics and marketing platforms including Facebook and Google, through software development kits embedded in the app, contrary to its own stated privacy promises. Flo settled the case without admitting liability, agreed to obtain user consent before further sharing health data and to have an independent review of its privacy practices. Since then, Flo has published an Anonymous Mode, which the company states removes name, email and technical identifiers from health data entered in the app, and updated its privacy policy to describe current data practices and third party sharing more explicitly. Flo is headquartered in the UK with operations in Lithuania and the US; it is privately owned, not part of a larger platform company at the time of writing. Buyers are people tracking cycles, fertility or pregnancy who need to weigh the utility of the app against the sensitivity of what they are logging, particularly relevant in jurisdictions where reproductive health data could be subject to law enforcement requests, most acutely discussed in the US context following the overturning of Roe v Wade. What a buyer should actually check before relying on any privacy claim is the current version of Flos published privacy policy and whether Anonymous Mode is enabled by default or opt-in, since the answer to that question is a real decision factor and can change between app updates.

What people use it for

  • Someone tracking cycle and ovulation who wants to weigh app convenience against the sensitivity of the data being logged
  • A user in a jurisdiction with legal risk around reproductive health data who wants to check Anonymous Mode and current data sharing policy before logging pregnancy or fertility attempts
  • A buyer wanting to compare Flo directly against Clue on published data practices before choosing which app to trust with this information
  • Someone who wants pregnancy tracking content alongside cycle tracking in one app rather than switching apps mid-pregnancy

The honest half

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Flo.

  • Flo Health settled with the US FTC in 2021 over allegations it shared sensitive health data, including pregnancy and menstruation details, with Facebook, Google and other third parties despite telling users the data would stay private, a fact directly relevant to how much a user should trust current privacy claims without independently checking the published policy.
  • Reproductive health data, including logged periods, fertility attempts and pregnancy status, has been the subject of law enforcement data requests in some jurisdictions following changes to reproductive rights law, and cloud-stored logs are a real category of exposure regardless of a vendors intentions.
  • Anonymous Mode, the privacy feature introduced after the settlement, is a setting that must be checked and understood rather than assumed, and its exact scope and default status should be verified in the current privacy policy rather than taken from marketing copy.
  • Free tier predictions rely on self-reported symptom data and general population models, so accuracy for irregular cycles or specific medical conditions is limited compared with clinical tracking.
  • The subscription auto-renews and, like most mobile subscriptions, must be cancelled through app store account settings rather than inside the app itself.

Cross-shopped

What people choose instead of Flo

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

  • Flo logo
    Flo
    vs
    Clue logo
    Clue

    Clue: If you want to compare published data practices and ownership before choosing a period tracking app

  • Flo logo
    Flo
    vs
    Peanut logo
    Peanut

    Peanut: If you want a community focused app for fertility, pregnancy and early parenting rather than cycle tracking specifically

Pricing

What Flo costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

Flo Premium

$11.99 /mo

  • Free tier covers core cycle tracking, predictions and symptom logging
  • Premium adds deeper personalised insights and expert content, around $11.99 a month
  • Annual and lifetime purchase options typically offered at a lower effective rate
  • Anonymous Mode available as a stated privacy option, check current policy for opt-in status

Capabilities

Features

  • Cycle and ovulation tracking

    Logged symptom and cycle data used to predict periods and fertile windows

  • Pregnancy mode

    Week-by-week pregnancy tracking and content once a pregnancy is logged

  • Anonymous Mode

    An opt-in setting Flo states disconnects entered health data from an identifiable profile

  • Symptom and mood logging

    Daily logging of physical symptoms, mood and other health markers

  • Expert content library

    Articles and video content from medical contributors, deeper library on Premium

  • Community and forums

    Anonymous discussion spaces organised around health topics

Answered, with sources

Questions people ask

Each answer names the page it came from, so you can check it rather than take our word for it.

What happened with the FTC in 2021?

The US FTC alleged Flo Health shared sensitive health data, including pregnancy and menstruation details, with third parties like Facebook and Google despite promising to keep it private. Flo settled without admitting liability, agreeing to obtain consent for future sharing and to an independent privacy review.

What is Anonymous Mode?

A privacy setting Flo states disconnects entered health data from an identifiable profile. Check the current app and privacy policy for whether it is on by default or must be turned on manually, since this affects what data is linked to your identity.

Is Flo free?

Core cycle tracking and predictions are free. Deeper personalised insights and expert content require Flo Premium.

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Softwr does not host reviews and shows no star rating for Flo, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

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