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Healthcare · head to head

Clue vs SurveyLegend

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
SurveyLegend logo

SurveyLegend

Surveys

Swedish survey tool hosted only in Frankfurt, where response limits are counted per survey and export is capped below what you can collect

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.; SurveyLegend every paid tier can collect more responses than it can export, with Pro gathering 5,000 per survey but exporting only 1,000 and Business gathering 20,000 but exporting 10,000, so data you have paid to collect can be stranded inside the product.
  • They diverge on capability: Clue covers Cycle and symptom tracking, SurveyLegend covers Per survey response limits.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Clue and SurveyLegend actually diverge.

Attributes where Clue and SurveyLegend differ
AttributeClueSurveyLegend
Pricing modelFree with a Plus subscriptionPer month by responses per survey
PlatformsiOS, AndroidWeb, iOS, Android
CategoryHealthcareSurveys

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 SurveyLegend

  • Per survey response limits
  • Frankfurt hosting on every plan
  • Image-led question types
  • Live analytics
  • Conditional logic flows
  • REST API and webhooks

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 SurveyLegend
  • A user who wants cycle tracking positioned around scientific research partnerships rather than lifestyle or community contentnot SurveyLegend
  • A buyer comparing Clue directly against Flo on current published privacy policy language before choosing which app to trustnot SurveyLegend
  • Someone tracking perimenopause or other non-standard cycle stages that some period apps do not support wellnot SurveyLegend

SurveyLegend

  • A European organisation that needs survey responses to stay in the EU without paying for an enterprise tier to get itnot Clue
  • Occasional research where a few surveys each collect a large number of responses, which suits a per-survey quota better than a monthly onenot Clue
  • Consumer-facing surveys where picture choice and visual scales lift completion rates on phonesnot Clue
  • Small teams that want a fixed low monthly cost rather than usage-based billingnot 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.

SurveyLegend

  • Every paid tier can collect more responses than it can export, with Pro gathering 5,000 per survey but exporting only 1,000 and Business gathering 20,000 but exporting 10,000, so data you have paid to collect can be stranded inside the product.
  • The free Starter plan cannot export data at all, only preview it in the live analytics, which makes it a demonstration rather than a usable plan and means any real project starts as a paid one.
  • The vendor claims neither SOC 2 nor ISO 27001 nor any third-party audit, and its GDPR page does not disclose hosting location, subprocessors or transfer mechanisms, so an enterprise security review will stall regardless of how good the residency story is.
  • The integration list runs to roughly four connectors with no native Zapier, Make, Slack, Teams, HubSpot or Airtable support, so anything beyond Google Sheets or Mailchimp has to be built against the API, which itself is unavailable below the Business tier.
  • No seat, collaborator or team permission model is documented anywhere in the pricing, features or user guide, so an organisation that needs several people to share and administer surveys has no described way to do it.

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

SurveyLegend

Free
  • StarterFree
    • Free forever
    • 3 surveys, 1,000 responses per survey
    • No data export at all
  • Pro$15/month
    • 170 USD per year billed annually, 19 USD if billed monthly
    • 20 surveys, 5,000 responses per survey
    • Export capped at 1,000 responses per survey
  • Business$25/month
    • 300 USD per year billed annually, 39 USD if billed monthly
    • Unlimited surveys, 20,000 responses per survey
    • Export capped at 10,000 responses per survey
  • Legendary$65/month
    • 780 USD per year billed annually, 89 USD if billed monthly
    • Unlimited surveys, 100,000 responses per survey
    • Unlimited data export

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 SurveyLegend if

  • You need per survey response limits.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want frankfurt hosting on every plan.
SurveyLegend review

Questions people ask

Is Clue or SurveyLegend better?
Neither clearly leads. Clue starts at Free and SurveyLegend at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Clue or SurveyLegend?
Clue starts at Free and SurveyLegend at Free.
Does Clue or SurveyLegend run on more platforms?
Clue runs on iOS, Android. SurveyLegend runs on Web, iOS, Android.
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 SurveyLegend is typically brought in for.
What can Clue do that SurveyLegend cannot?
Clue covers Cycle and symptom tracking, Cycle insights and patterns, Research partnerships, EU-based data hosting. SurveyLegend covers Per survey response limits, Frankfurt hosting on every plan, Image-led question types, Live analytics.

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.

SurveyLegend: Where is my data stored?

In Frankfurt, Germany, on DigitalOcean, on every plan including the free one, with backups also held in Frankfurt. There is no United States transfer and no residency upgrade to buy.

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.

SurveyLegend: What is the catch with the free plan?

You cannot export your data. You can build three surveys, collect a thousand responses each and view the analytics, but getting the raw responses out requires a paid plan.

Clue: Is Clue free?

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

SurveyLegend: Why does Pro cost 170 USD a year when the page shows 15 USD a month?

The published annual total is 170 USD, which is ten dollars below twelve times the stated monthly-equivalent rate. Both figures are printed on the vendor pricing page.

SurveyLegend: Is it suitable for an enterprise rollout?

Probably not. There is no SOC 2 or ISO 27001 certification, no documented team or permission model, and support is by email with phone access only on the top tier.

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