Cycles vs Flo: how do they compare?
Cycles and Flo are both listed on HerFound, and both carry facts sourced from their own pages. Same for both: creating an account is optional. Last checked Nov 12, 2026.
Updated . We don't pick a winner or publish ratings. This sets out what each company says, side by side.
Side by side
 Cycles |  Flo | |
|---|---|---|
| What it is | A period tracker for iPhone: predict your periods and fertile days and share your cycle phases with a partner. | A period and ovulation tracker: predictions plus personalized health insights. |
| Price model | Freemium | Freemium |
| Platforms | iOS | iOS, Android |
| Free version | — | There is a free version. |
| Paid plan | $2.99 to $59.99 | $1.99 to $59.99 |
| Selling personal data | — | Says it does not sell personal data for money. |
| Advertising | Says some data is used or shared for advertising. | Says some data is used or shared for advertising. |
| Account | Creating an account is optional. | Creating an account is optional. |
| Where your data is kept | Offers a mode that keeps your data on your device. | Offers an anonymous mode: data is stored on its servers without your name or email. |
| Deleting your data | You can delete your data or account from inside the app. | You can delete your data or account from inside the app. |
| Company based in | — | United Kingdom |
| Apple Watch | Has an Apple Watch app. | Has an Apple Watch app. |
Sources: each app's own privacy policy, help pages and US App Store listing. Open either app to read the exact passage behind each line and the date we checked it. “—” means we have not sourced that fact yet. This is what each company states, not an audit of what it does.
What Cycles does
People who menstruate and want to track their cycle, and their partners, who can be invited to follow cycle phases.
- 🗓️ A colour-coded cycle and calendar view
- 📝 Log moods, body observations and sexual activity
- 🔮 Predictions for periods, ovulation, PMS and fertile days
- 💑 Invite a partner, who sees your cycle phases only
- 📈 Charts and insights for spotting your patterns
- ⏰ Custom reminders for birth control or fertile days with Premium
- 🔒 Optional passcode or Face ID lock, and no account needed
- ⌚ Works on iPhone, iPad and Apple Watch
What Flo does
People tracking their periods, ovulation, pregnancy and perimenopause; Flo describes itself as a women's health app.
- 🩸 Period and cycle tracking that predicts your next period
- 🌱 Ovulation and fertile-day tracking for when you're trying to conceive
- 🤰 Week-by-week pregnancy tracking
- 🌙 Perimenopause symptom information and support
- 💞 Flo for Partners: share your cycle information with a partner (Premium)
- 🕶️ Anonymous Mode: no name or email linked to your health data
- 🤖 Premium extras: a health assistant chatbot and personalised health reports
Cycles vs Flo: common questions
Cycles's paid plan is listed at $2.99 to $59.99. Flo's is listed at $1.99 to $59.99. Prices change and differ by country; each listing shows where and when we read them.
Cycles: creating an account is optional. Flo: creating an account is optional.
Cycles: offers a mode that keeps your data on your device. Flo: offers an anonymous mode: data is stored on its servers without your name or email.