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Healthcare · head to head

Flo vs Fujifilm Synapse

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
Fujifilm Synapse logo

Fujifilm Synapse

Healthcare

Enterprise imaging platform covering PACS, VNA, cardiology and 3D from Fujifilm Healthcare

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.; Fujifilm Synapse pACS, VNA, Cardiovascular and 3D are separately licensed and separately versioned, so an enterprise deployment means four upgrade cycles and four support relationships under one brand rather than one platform upgrade.
  • They diverge on capability: Flo covers Cycle and ovulation tracking, Fujifilm Synapse covers Synapse PACS.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Flo and Fujifilm Synapse actually diverge.

Attributes where Flo and Fujifilm Synapse differ
AttributeFloFujifilm Synapse
Starting priceFreeOn request
Pricing modelFree with a Premium subscriptionquote
Free tierYesNo
PlatformsiOS, Android, WebWeb, Windows, iOS, Android

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 Fujifilm Synapse

  • Synapse PACS
  • Synapse VNA
  • Synapse Cardiovascular
  • Synapse 3D
  • Synapse Mobility
  • Deconstructed PACS support
  • Cloud services

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 Fujifilm Synapse
  • 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 Fujifilm Synapse
  • A buyer wanting to compare Flo directly against Clue on published data practices before choosing which app to trust with this informationnot Fujifilm Synapse
  • Someone who wants pregnancy tracking content alongside cycle tracking in one app rather than switching apps mid-pregnancynot Fujifilm Synapse

Fujifilm Synapse

  • A hospital replacing PACS that wants the archive decoupled from its scanner vendor so future modality purchases stay competitivenot Flo
  • A health system consolidating radiology, cardiology, ophthalmology and wound images into one vendor neutral archive with a single retention policynot Flo
  • An outpatient imaging chain that needs one worklist across multiple sites and radiologists reading remotelynot Flo
  • A site pursuing a deconstructed PACS strategy that wants to replace the viewer later without touching the archivenot 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.

Fujifilm Synapse

  • PACS, VNA, Cardiovascular and 3D are separately licensed and separately versioned, so an enterprise deployment means four upgrade cycles and four support relationships under one brand rather than one platform upgrade.
  • Synapse 3D is licensed by concurrent user and sized from average concurrency, which leaves radiologists queued for advanced visualisation at the morning reading peak and forces an unplanned licence purchase.
  • As an independent informatics vendor Fujifilm has less privileged access to proprietary modality data than Philips or Siemens have on their own scanners, so some vendor specific post processing is not available.
  • The vendor neutral archive absorbs non DICOM object types only after per specialty configuration work, and departments such as ophthalmology and dermatology usually need bespoke ingestion projects that were not in the original scope.
  • Migrating a decade of priors from a legacy archive is a large professional services line that Fujifilm quotes separately, and these migrations regularly run past the contracted go live date.

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

Fujifilm Synapse

On request
  • Synapse$undefined/year
    • Each module licensed separately: PACS, VNA, Cardiovascular, 3D
    • Priced by annual study volume and concurrent diagnostic users
    • Synapse 3D licensed by concurrent user, separate from PACS

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 Fujifilm Synapse if

  • You need synapse pacs.
  • You work on Web, Windows, iOS, Android.
  • You also want synapse vna.
Fujifilm Synapse review

Questions people ask

Is Flo or Fujifilm Synapse better?
Neither clearly leads. Flo starts at Free and Fujifilm Synapse at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flo or Fujifilm Synapse?
Flo has a free tier; the other does not. Paid plans start at Free for Flo and On request for Fujifilm Synapse.
Does Flo or Fujifilm Synapse run on more platforms?
Flo runs on iOS, Android, Web. Fujifilm Synapse runs on Web, Windows, iOS, Android.
Can I use Flo for free?
Yes. Flo has a free tier, so you can try it without paying. Fujifilm Synapse 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 Fujifilm Synapse is typically brought in for.
What can Flo do that Fujifilm Synapse cannot?
Flo covers Cycle and ovulation tracking, Pregnancy mode, Anonymous Mode, Symptom and mood logging. Fujifilm Synapse covers Synapse PACS, Synapse VNA, Synapse Cardiovascular, Synapse 3D.

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.

Fujifilm Synapse: Is Synapse one product or several?

Several. Synapse PACS, Synapse VNA, Synapse Cardiovascular and Synapse 3D are separately licensed products under one brand. Price and scope each one individually.

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.

Fujifilm Synapse: Do I have to buy Fujifilm scanners?

No. Fujifilm sells Synapse independently of imaging hardware, which is a large part of why it wins competitive PACS replacements at mixed fleet sites.

Flo: Is Flo free?

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

Fujifilm Synapse: Does Synapse publish pricing?

No. Pricing is quoted by study volume, concurrent users, module mix and storage capacity.

Fujifilm Synapse: Can Synapse VNA store non radiology images?

Yes, including visible light, ophthalmology and wound photography, but each specialty typically needs its own ingestion and metadata configuration project.

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