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Menstrual Cycle · Updated 2026-04-18

Clue Review (2026)

Polished, science-forward cycle tracker — read the privacy policy first.

7.8 / 10
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Clue is the Berlin-based polished cycle tracker — science-forward content, clean UI. For users who don’t need the absolute privacy posture of Euki, Clue is a reasonable middle path.

See cycle tracking rankings.

The good and the bad

What we love

  • Excellent UX
  • Research-backed content

What we don't

  • Cloud-based
  • Data policy is detailed — read it

Pricing & plans

Free
$0
Basic tracking
Plus
$39.99/year
Advanced predictions, content, modes

Recommendations

Use Clue if you…

  • Want a polished cycle tracker
  • Value science-forward content

Skip Clue if you…

  • Privacy is the dominant concern

Best alternatives to Clue

Euki

Privacy-first alternative.

Read the Euki review →
Flo

Larger user base — but read about FTC history.

Read the Flo review →

Frequently asked questions

Is Clue safe to use?
Clue has a stronger privacy reputation than Flo and publishes detailed transparency reports. For maximum privacy, Euki and Drip remain the gold standard.