Softwr

Healthcare · head to head

Flo vs Lunit

Flo logo

Flo

Healthcare

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

From
Free
Rated
-
Full reviewWebsite
Lunit logo

Lunit

Healthcare

FDA cleared and CE marked AI for mammography, tomosynthesis and chest radiography

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Flo has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; Lunit the regulatory permission differs by product and by region, and INSIGHT Risk has been filed with the FDA but not cleared, so a buyer who reads a corporate press release rather than the specific clearance for their product and jurisdiction will plan a deployment they cannot legally run.
  • They diverge on capability: Flo covers Cycle and ovulation tracking, Lunit covers Lunit INSIGHT MMG.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Flo and Lunit actually diverge.

Attributes where Flo and Lunit differ
AttributeFloLunit
Starting priceFreeOn request
Pricing modelFree with a Premium subscriptionquote
Free tierYesNo
PlatformsiOS, Android, WebWeb

Identical on both: user rating (Not yet rated), category (Healthcare).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Flo

  • Cycle and ovulation tracking
  • Pregnancy mode
  • Anonymous Mode
  • Symptom and mood logging
  • Expert content library
  • Community and forums

Only in Lunit

  • Lunit INSIGHT MMG
  • Lunit INSIGHT DBT
  • Lunit INSIGHT CXR
  • Volpara density assessment
  • Volpara RiskPathways
  • Volpara dose tracking
  • PACS and mammography workstation integration

What people use each for

The jobs each tool is most often brought in to do.

Flo

  • Someone tracking cycle and ovulation who wants to weigh app convenience against the sensitivity of the data being loggednot Lunit
  • 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 attemptsnot Lunit
  • A buyer wanting to compare Flo directly against Clue on published data practices before choosing which app to trust with this informationnot Lunit
  • Someone who wants pregnancy tracking content alongside cycle tracking in one app rather than switching apps mid-pregnancynot Lunit

Lunit

  • A national breast screening programme evaluating AI as a second reader to reduce double reading workload where two human readers are currently mandatednot Flo
  • A breast centre that moved to tomosynthesis and now has reading times it cannot staff, wanting detection support on DBT specificallynot Flo
  • An American breast imaging centre needing automated volumetric density assessment to meet patient density notification requirements, which is what Volpara is bought fornot Flo
  • A tuberculosis or lung screening programme in a high volume, radiologist scarce setting using chest radiography triage to prioritise filmsnot Flo

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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.

Lunit

  • The regulatory permission differs by product and by region, and INSIGHT Risk has been filed with the FDA but not cleared, so a buyer who reads a corporate press release rather than the specific clearance for their product and jurisdiction will plan a deployment they cannot legally run.
  • Detection AI changes recall rates in screening, and the downstream cost of additional diagnostic workup lands on the programme rather than on the software budget, which is the cost most screening business cases omit.
  • Performance is sensitive to the mammography vendor and acquisition protocol, so published results from a Hologic estate do not transfer to a GE or Siemens estate without local validation the buyer must fund.
  • MMG, DBT and CXR are licensed separately and Volpara modules are separate again, so a breast centre wanting detection, density and risk pathways is assembling four line items rather than buying one product.
  • Using AI as a replacement for one of two human readers is a workforce and liability decision that regulators and professional bodies treat differently in each country, so the saving that justifies the purchase may not be permitted where you operate.

Pricing, plan by plan

Flo

Free
  • Flo Premium$11.99/month
    • 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

Lunit

On request
  • Lunit INSIGHT$undefined/year
    • Priced per study or per annual examination volume by product
    • MMG, DBT and CXR licensed separately
    • Volpara density and RiskPathways modules quoted separately

Which should you pick?

Choose Flo if

  • You need cycle and ovulation tracking.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want pregnancy mode.
Flo review

Choose Lunit if

  • You need lunit insight mmg.
  • You also want lunit insight dbt.
Lunit review

Questions people ask

Is Flo or Lunit better?
Neither clearly leads. Flo starts at Free and Lunit at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flo or Lunit?
Flo has a free tier; the other does not. Paid plans start at Free for Flo and On request for Lunit.
Does Flo or Lunit run on more platforms?
Flo runs on iOS, Android, Web. Lunit runs on Web.
Can I use Flo for free?
Yes. Flo has a free tier, so you can try it without paying. Lunit starts at On request.
What is Flo best used for?
Flo is most often used 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. Of those, someone tracking cycle and ovulation who wants to weigh app convenience against the sensitivity of the data being logged and 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 are not what Lunit is typically brought in for.
What can Flo do that Lunit cannot?
Flo covers Cycle and ovulation tracking, Pregnancy mode, Anonymous Mode, Symptom and mood logging. Lunit covers Lunit INSIGHT MMG, Lunit INSIGHT DBT, Lunit INSIGHT CXR, Volpara density assessment.

Answered from the vendors’ own pages

Flo: 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.

Lunit: Is Lunit FDA cleared?

Yes for specific products. INSIGHT MMG, INSIGHT DBT and INSIGHT CXR Triage hold FDA 510(k) clearances. INSIGHT Risk, the five year risk prediction model, has been filed but was not cleared at the time of writing.

Flo: 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.

Lunit: Can Lunit replace a second human reader in screening?

That depends entirely on your jurisdiction and professional body guidance, not on the software. The CE mark permits clinical use; it does not authorise a workforce model.

Flo: Is Flo free?

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

Lunit: What did the Volpara acquisition add?

Volumetric breast density measurement, dose tracking and RiskPathways high risk programme management, which are the things American breast centres buy for density notification compliance rather than for detection.

Lunit: Is pricing published?

No. It is quoted per study or per annual volume, by product, with on premises and cloud priced differently.

Share

Related pages

More on Flo

More on Lunit

Keep looking

Other head to heads