Softwr

Healthcare · head to head

Clue vs GNU Health

Clue logo

Clue

Healthcare

Period and cycle tracking app owned by German company Biowink, positioned around science based tracking and a published stance against sharing data with law enforcement

From
Free
Rated
-
Full reviewWebsite
GNU Health logo

GNU Health

Healthcare

Free hospital and health information system from a small NGO, built on the Tryton framework

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Clue clues stated policy on not sharing data with law enforcement without a valid legal process is the companys own published position and legal interpretation, not an independent guarantee, and it can still be compelled to comply with a legally binding request under EU or other applicable law.; GNU Health development depends on GNU Solidario, a very small nonprofit funded by donations and training, so release cadence and long-term continuity are tied to a handful of people rather than to an engineering organisation.
  • They diverge on capability: Clue covers Cycle and symptom tracking, GNU Health covers Electronic medical record.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Clue and GNU Health actually diverge.

Attributes where Clue and GNU Health differ
AttributeClueGNU Health
Pricing modelFree with a Plus subscriptionOpen source, no licence fee
PlatformsiOS, AndroidLinux, Web, Self-hosted

Identical on both: starting price (Free), free tier (Yes), 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 Clue

  • Cycle and symptom tracking
  • Cycle insights and patterns
  • Research partnerships
  • EU-based data hosting
  • Fertility and conception mode
  • Perimenopause and other life stage tracking

Only in GNU Health

  • Electronic medical record
  • Hospital management
  • Laboratory information system
  • Social medicine modules
  • Tryton business modules
  • Health federation
  • ICD and standards support
  • Modular installation

What people use each for

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

Clue

  • Someone specifically weighing data jurisdiction and legal exposure when choosing a period tracking app, given Clues EU basis and published stance on law enforcement requestsnot GNU Health
  • A user who wants cycle tracking positioned around scientific research partnerships rather than lifestyle or community contentnot GNU Health
  • A buyer comparing Clue directly against Flo on current published privacy policy language before choosing which app to trustnot GNU Health
  • Someone tracking perimenopause or other non-standard cycle stages that some period apps do not support wellnot GNU Health

GNU Health

  • A public hospital in a low-resource setting that cannot fund commercial EMR licensing and has in-house Linux capabilitynot Clue
  • A ministry building a national health network where source code inspection and data sovereignty are policy requirementsnot Clue
  • A university teaching health informatics that needs a complete, inspectable system rather than a vendor demonstrationnot Clue
  • A community health programme that needs socioeconomic determinants recorded alongside clinical datanot Clue

Where each one falls short

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

Clue

  • Clues stated policy on not sharing data with law enforcement without a valid legal process is the companys own published position and legal interpretation, not an independent guarantee, and it can still be compelled to comply with a legally binding request under EU or other applicable law.
  • Deeper cycle insights and predictions, the features most likely to justify tracking in the first place, are gated behind the Clue Plus subscription rather than fully free.
  • Being a smaller company than some competitors, Clue has less capital and legal resource to contest large-scale legal requests than a larger, better-funded rival might, despite its stated intent to do so.
  • Research partnerships using anonymised user data, while opt-in, still mean user-derived data can be used in ways beyond direct app functionality, and users should check current consent settings.
  • Cycle predictions rely on self-reported data and general population models, so accuracy for irregular cycles or specific medical conditions remains limited regardless of which app is used.

GNU Health

  • Development depends on GNU Solidario, a very small nonprofit funded by donations and training, so release cadence and long-term continuity are tied to a handful of people rather than to an engineering organisation.
  • It is built on Tryton, a framework few health IT staff know, so hiring or contracting people who can extend and maintain it is materially harder than for a mainstream stack.
  • Installation, upgrades and database administration assume Linux and Python competence, which puts the real cost on staffing rather than on licensing and defeats hospitals that lack that team.
  • The interface is functional rather than designed, and clinician acceptance is a genuine deployment risk compared with commercial systems that have invested heavily in usability.
  • Certification, regulatory conformance and interoperability testing that some jurisdictions demand of clinical systems are not provided by a vendor, so the adopting institution has to carry that work and that liability itself.

Pricing, plan by plan

Clue

Free
  • Clue Plus$9.99/month
    • Free tier covers core cycle tracking, logging and basic predictions
    • Clue Plus adds deeper cycle insights, extended predictions and personalised content
    • Annual Plus plans typically offered at a lower effective monthly rate

GNU Health

Free
  • GNU HealthFree
    • GNU GPL licence
    • All modules included
    • No patient, bed or user limits
  • Support and training$undefined/year
    • Paid support and implementation from GNU Solidario
    • Training courses and certification
    • Quoted per institution

Which should you pick?

Choose Clue if

  • You need cycle and symptom tracking.
  • You want to start without paying.
  • You work on iOS, Android.
  • You also want cycle insights and patterns.
Clue review

Choose GNU Health if

  • You need electronic medical record.
  • You want to start without paying.
  • You work on Linux, Web, Self-hosted.
  • You also want hospital management.
GNU Health review

Questions people ask

Is Clue or GNU Health better?
Neither clearly leads. Clue starts at Free and GNU Health at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Clue or GNU Health?
Clue starts at Free and GNU Health at Free.
Does Clue or GNU Health run on more platforms?
Clue runs on iOS, Android. GNU Health runs on Linux, Web, Self-hosted.
Can I use Clue for free?
Both have a free tier, so you can try either at no cost before committing.
What is Clue best used for?
Clue is most often used for someone specifically weighing data jurisdiction and legal exposure when choosing a period tracking app, given clues eu basis and published stance on law enforcement requests, a user who wants cycle tracking positioned around scientific research partnerships rather than lifestyle or community content, a buyer comparing clue directly against flo on current published privacy policy language before choosing which app to trust, someone tracking perimenopause or other non-standard cycle stages that some period apps do not support well. Of those, someone specifically weighing data jurisdiction and legal exposure when choosing a period tracking app, given clues eu basis and published stance on law enforcement requests and a user who wants cycle tracking positioned around scientific research partnerships rather than lifestyle or community content are not what GNU Health is typically brought in for.
What can Clue do that GNU Health cannot?
Clue covers Cycle and symptom tracking, Cycle insights and patterns, Research partnerships, EU-based data hosting. GNU Health covers Electronic medical record, Hospital management, Laboratory information system, Social medicine modules.

Answered from the vendors’ own pages

Clue: Does Clue share data with law enforcement?

Clue publishes a policy stating it does not share health data with law enforcement or public authorities without a legally binding request and states it will challenge requests it considers improper. This is the companys stated position; verify the current policy directly for specifics.

GNU Health: Who develops GNU Health?

GNU Solidario, a Spanish nonprofit NGO, as an official GNU package under the GPL.

Clue: Why does Clue emphasise being an EU company?

Clue operates under EU GDPR data protection rules and states this legal basis makes it harder for authorities outside the EU, including US authorities, to compel data disclosure than for a company based in the US.

GNU Health: Is there commercial support?

Yes, in a limited form, from GNU Solidario itself and a small number of implementers. It is not a vendor support organisation.

Clue: Is Clue free?

Core cycle tracking, logging and basic predictions are free. Deeper insights and extended predictions require Clue Plus.

GNU Health: What is it built on?

Tryton, a Python business application framework, which is where its accounting, stock and HR modules come from.

GNU Health: Is it suitable for a large hospital?

It is deployed in hospitals, but the deciding factor is whether you have internal Linux, Python and Tryton capability rather than the size of the institution.

Share

Related pages

More on Clue

More on GNU Health

Keep looking

Other head to heads