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Flo vs Clue: which period tracker is better?

Flo and Clue both have free versions and paid tiers. Flo has the bigger expert library, a community and an Anonymous Mode; Clue is Berlin-based under GDPR and science-led, and scored 8 out of 10 against Flo’s 7 in Mozilla’s July 2026 review. Clue Plus holds sharing, Conceive and Perimenopause; Flo Premium holds courses, a Health Assistant and the doctor report. Neither is better for everyone.

Written by the Splash team · Updated · 15 sources

On this page 5 sections
  1. How do Flo and Clue compare?
  2. Which is more private, Flo or Clue?
  3. Which should I choose?
  4. Questions people ask
  5. Sources

How do Flo and Clue compare?

Flo vs Clue, from each app’s own pages
FloClue
Free versionYes: predictions, symptoms, calendar, Secret Chats, Anonymous ModeYes: tracking, with a basic Pregnancy mode
Paid tierPremium (monthly, yearly or Family plan)Clue Plus (monthly or yearly)
Sharing with a partnerBasic Flo for Partners free for allSharing your own cycle needs Clue Plus; viewing is free; partner sees phases only
Doctor reportPremium, iOS only, last six monthsNot verified
Conceive / perimenopause modesNot verifiedBoth part of Clue Plus
Symptom CheckerPremium; not available in the UK or EUNot verified
AccountOptional Anonymous Mode needs no emailAccount needed to share
Company baseNot verifiedBerlin, under GDPR
Mozilla July 2026 score7 out of 108 out of 10

Not verified means we could not confirm it from a public source. Prices vary by region and are not quoted.

Which is more private, Flo or Clue?

Mozilla’s July 2026 review, as reported by DH Insights, scored Clue 8 and Flo 7 out of 10. It said Clue is upfront about how it uses data users agree to share, and that Flo does not share health data with advertisers, analytics or marketing partners and offers Anonymous Mode. Flo settled FTC allegations over data sharing in 2021, and in August 2025 a California jury found Meta liable for collecting data from Flo’s app; Flo had settled before the verdict. Read each privacy policy for today’s position.

Which should I choose?

  • Choose Flo if you want a very large expert library, a community, a chat-style Health Assistant and are happy to subscribe for them.
  • Choose Clue if you value named clinician authors, research partnerships and EU jurisdiction.
  • Choose Splash if you want sharing, a doctor report and every mode free, with no account. It can import a Flo or Clue export on your phone, so you can try it beside either.

Questions people ask

Is Clue better than Flo?

Neither wins for everyone. Clue is science-led, Berlin-based under GDPR and scored 8 out of 10 in Mozilla’s July 2026 review. Flo has a larger library, a community and a free Anonymous Mode, and scored 7. Compare what you would use, and check which features sit behind Premium or Plus.

Is Flo or Clue free?

Both have free versions. Flo Premium adds cycle patterns, expert courses, a Health Assistant and a Symptom Checker not available in the UK, plus a doctor report on iOS. Clue Plus adds sharing your own cycle, Conceive and Perimenopause modes and fuller pregnancy insights. Prices vary by region.

Can I move from Flo to Clue, or to Splash?

Yes. Both let you request a copy of your data. Splash can import a Flo export (JSON, or a zip) and a Clue export (measurements.json) on your phone without uploading the file. Flo can take a few days to send yours, and Clue’s link works for 72 hours, so save the file promptly.

Sources

  1. Flo help centre: What is included in Flo Premium (posted 4 Oct 2024) accessed 2026-10-28
  2. Flo: Premium membership (free vs Premium table) accessed 2026-10-26
  3. Flo help centre: What is the price for a Flo subscription? accessed 2026-10-28
  4. Flo help centre: Do I need a subscription to access Flo for Partners? (posted 3 Oct 2024) accessed 2026-10-28
  5. Flo: Anonymous Mode FAQ accessed 2026-10-26
  6. FTC: FTC finalizes order with Flo Health (22 Jun 2021) accessed 2026-10-26
  7. FemTech Insider: California jury rules Meta violated privacy laws in Flo Health data case (6 Aug 2025) accessed 2026-10-28
  8. Clue support: How much does Clue Plus cost? accessed 2026-10-26
  9. Clue support: What’s included in Clue Plus? accessed 2026-10-28 (Clue blocks automated fetching; read through a search excerpt.)
  10. Clue support: What is the free version of Clue Pregnancy mode? accessed 2026-10-28 (Clue blocks automated fetching; read through a search excerpt.)
  11. Clue support: What’s Clue Perimenopause mode? accessed 2026-10-28 (Clue blocks automated fetching; read through a search excerpt.)
  12. Clue support: How can I share my cycle using Clue Connect? accessed 2026-10-26
  13. Clue on the App Store accessed 2026-10-26
  14. Mozilla Foundation: Nothing Personal, period and ovulation trackers (16 Jul 2026) accessed 2026-10-28 (Mozilla’s page blocks automated fetching. The findings used here are checked against the two reports listed next to it.)
  15. DH Insights: Mozilla report reveals wide privacy gaps among popular period tracking apps (30 Jul 2026) accessed 2026-10-28

Splash makes one of the apps mentioned here, so every claim about another app links to its own page or an independent source. Spotted something wrong? Email us and we will fix it and note the change.

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General information, not medical advice. Splash is not contraception, not a medical device and cannot diagnose, and it is not affiliated with the NHS. If you are worried, talk to a GP, pharmacist or sexual health clinic. How we write and check content.

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