Softwr

Healthcare · head to head

Flo vs Sysmex

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
Sysmex logo

Sysmex

Healthcare

Haematology and urinalysis analysers sold with the middleware that decides which results a scientist ever sees

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.; Sysmex the middleware is not realistically separable from the instrument contract, so a laboratory that likes Caresphere but wants another vendor analyser has no clean path to buying just the software.
  • They diverge on capability: Flo covers Cycle and ovulation tracking, Sysmex covers Caresphere autovalidation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Flo and Sysmex actually diverge.

Attributes where Flo and Sysmex differ
AttributeFloSysmex
Starting priceFreeOn request
Pricing modelFree with a Premium subscriptionquote
Free tierYesNo
PlatformsiOS, Android, WebWeb, Windows, On-premise

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 Sysmex

  • Caresphere autovalidation
  • Delta and moving average QC
  • WAM rule sets
  • Fleet telemetry
  • Reagent inventory tracking
  • Extended white cell parameters
  • LIS interfacing
  • Multi-site harmonisation

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

Sysmex

  • A hospital network standardising full blood count reporting across six laboratories so a result released at a district hospital carries the same rules as the tertiary centrenot Flo
  • A pathology group trying to raise autovalidation rates to absorb rising demand without recruiting more biomedical scientistsnot Flo
  • A blood sciences service consolidating haematology, coagulation and urinalysis onto one middleware layer to remove three separate QC workflowsnot Flo
  • A laboratory running 24 hour service that needs remote analyser telemetry so an overnight fault is triaged before the morning shift arrivesnot 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.

Sysmex

  • The middleware is not realistically separable from the instrument contract, so a laboratory that likes Caresphere but wants another vendor analyser has no clean path to buying just the software.
  • Reagent rental agreements set a minimum annual test volume, and a laboratory whose activity falls after a service reconfiguration keeps paying against a floor it no longer reaches.
  • Regulatory clearance is granted per parameter and per region, so a flag or extended parameter that a European laboratory relies on may not be released for clinical use on the same analyser in the United States.
  • Interfacing to a non-Sysmex laboratory information system is a project, not a configuration step, and integration effort is often quoted separately from the instrument contract.
  • Autovalidation rule sets are configured locally, so the gains depend entirely on whether the laboratory has the clinical governance capacity to write, validate and audit those rules; buying the software does not deliver the saving on its own.

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

Sysmex

On request
  • Reagent rental or cost per reportable result contract$undefined/year
    • Analyser hardware, reagents, service and Caresphere middleware bundled into a price per test
    • Five to seven year term typical
    • Minimum annual test volume commitment

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 Sysmex if

  • You need caresphere autovalidation.
  • You work on Web, Windows, On-premise.
  • You also want delta and moving average qc.
Sysmex review

Questions people ask

Is Flo or Sysmex better?
Neither clearly leads. Flo starts at Free and Sysmex at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flo or Sysmex?
Flo has a free tier; the other does not. Paid plans start at Free for Flo and On request for Sysmex.
Does Flo or Sysmex run on more platforms?
Flo runs on iOS, Android, Web. Sysmex runs on Web, Windows, On-premise.
Can I use Flo for free?
Yes. Flo has a free tier, so you can try it without paying. Sysmex 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 Sysmex is typically brought in for.
What can Flo do that Sysmex cannot?
Flo covers Cycle and ovulation tracking, Pregnancy mode, Anonymous Mode, Symptom and mood logging. Sysmex covers Caresphere autovalidation, Delta and moving average QC, WAM rule sets, Fleet telemetry.

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.

Sysmex: Can I buy Caresphere without Sysmex analysers?

Not in practice. It is licensed as part of the instrument and reagent agreement, and its value depends on Sysmex-specific parameters and flags.

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.

Sysmex: Is Sysmex software FDA cleared?

Clearance attaches to the analysers and to individual reported parameters, not to the middleware as a whole. Check the specific parameter and the specific market, because clearances differ between the United States, Europe and Japan.

Flo: Is Flo free?

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

Sysmex: How is it priced?

Per reportable result, or as a reagent rental with a minimum annual volume. There is no per user or per seat price.

Sysmex: What is the contract length?

Typically five to seven years, aligned to instrument depreciation, with reagent pricing fixed or indexed over the term.

Share

Related pages

More on Flo

More on Sysmex

Keep looking

Other head to heads