Flo vs Clue: which is better in 2026?
Short answer: choose Clue if privacy comes first and you want detailed charts of how your cycle affects you; it is based in Berlin and says your data is protected by European privacy law (GDPR). Choose Flo if you want an app with lots of health content and a community, plus an Anonymous Mode that works without your name or email. Both track periods, ovulation and pregnancy.
How we compare: what each developer says the app does in its own App Store description, how detailed the tracking is, how each one handles your data, and which life stages it covers. Then the current standing of both on the Censuus ranking.
| Flo | Clue | |
|---|---|---|
| Best for | health content and community | privacy and detailed cycle charts |
| Symptoms to log | 70+ symptoms and moods | 200+ symptoms and experiences |
| Privacy | Anonymous Mode without name or email | based in Berlin, data under GDPR |
| Life stages | period, trying to conceive, pregnancy, perimenopause | period, trying to conceive, pregnancy, perimenopause |
| Wearables | Apple Watch app | Apple Watch, Oura and other wearables |
| Developer | Flo Health | BioWink GmbH, Berlin |
Which one tracks more?
Both predict your next period and fertile window. Clue lets you log over 200 symptoms and experiences, from cramps and energy to skin and sleep, and shows the patterns in charts. Flo covers 70+ symptoms and moods and turns them into personal insights and summaries you can share with a doctor.
Which one is better for privacy?
Clue leads with privacy: it is headquartered in Berlin and says your data is protected by the GDPR. Flo offers an Anonymous Mode that lets you use the tracker without linking your name, email or other identifiers, and points to its ISO security certifications. If privacy is the deciding factor, start with Clue.
Content and community
Flo puts more weight on health content written with doctors and on Secret Chats, where members share experiences. Clue has a library of 400+ science-backed articles. Both cover trying to conceive, pregnancy and perimenopause, and neither is a method of birth control.
The verdict
Pick Clue for privacy and detailed charts, and if you use a wearable. Pick Flo for health content, community and Anonymous Mode. For more options, see our period tracker apps guide.
Frequently asked questions
Is Flo or Clue better?
Neither outright. Clue is better if privacy and detailed symptom charts matter most; Flo is better for health content, community and its Anonymous Mode.
Where is Clue based?
Clue is made by BioWink GmbH, headquartered in Berlin, and says your data is protected by European privacy law (GDPR).
Can Flo or Clue be used as birth control?
No. Flo states it is not a method of birth control. Clue lets you log the birth control method you use, but does not replace it.