Flo
Verified working Aug 19, 2026
A cycle, fertility, pregnancy, and perimenopause tracker in one app.
Flo is a mobile health app for logging menstrual cycles, symptoms, ovulation, pregnancy progress, and perimenopause changes. It combines personal tracking with predictions, educational health content, calculators, and optional partner sharing, with medical information reviewed by a large clinical and scientific team.
Why it stands out
- Covers multiple reproductive-health stages rather than only period tracking or pregnancy tracking.
- Large user base and review footprint, with the page citing hundreds of millions of users and millions of five-star ratings.
- Medical content is reviewed by a stated team of 100+ doctors, scientists, and health experts.
- Includes privacy-focused options such as Anonymous Mode and a dedicated Privacy Portal.
- Partner sharing is built into the product, which is less common in basic cycle trackers.
Good to know
- Primarily a mobile app for iOS and Android, not a full desktop-based tracking tool.
- Cycle, ovulation, and fertility predictions depend on logged data and should not replace clinician guidance.
- Some features or content may require Flo Premium rather than the free app.
Under the radar: If privacy is your main concern, review Flo’s Anonymous Mode and Privacy Portal before you start logging sensitive cycle or pregnancy details.
Photos
People tracking menstrual cycles, fertility, pregnancy, or perimenopause can keep symptoms and timing in one place. Estimate upcoming periods and ovulation windows from logged cycle history. Follow pregnancy week by week with milestone information and checklist-style guidance. Use calculators for due dates, ovulation, pregnancy tests, hCG, and menstrual timing. Share selected reproductive-health context with a partner for support during cycles or pregnancy.
Cycle and symptom logging; period and ovulation predictions; fertility education and conception tips; pregnancy tracker with weekly updates; perimenopause support; partner sharing; symptom checker; health library; reproductive-health calculators; Anonymous Mode and privacy resources; optional Flo Premium.
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Similar sites elsewhere
- Clue — helloclue.com
- Ovia — oviahealth.com
- Natural Cycles — naturalcycles.com
- Glow — glowing.com
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