Flo vs Glow: how do they compare?
Flo and Glow are both listed on HerFound, and both carry facts sourced from their own pages. Same for both: there is a free version. On selling data, the same for both: says it does not sell personal data for money. 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
 Flo |  Glow | |
|---|---|---|
| What it is | A period and ovulation tracker: predictions plus personalized health insights. | A fertility and ovulation tracker: period forecasts, partner sharing and community forums |
| Price model | Freemium | Freemium |
| Platforms | iOS, Android | iOS, Android |
| Free version | There is a free version. | There is a free version. |
| Paid plan | $1.99 to $59.99 | $59.99/year, $29.99 every 3 months or $99.99 lifetime |
| Selling personal data | Says it does not sell personal data for money. | 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. | — |
| Where your data is kept | Offers an anonymous mode: data is stored on its servers without your name or email. | Offers a mode that keeps your data on your device. |
| Deleting your data | You can delete your data or account from inside the app. | You can ask the company to delete your data. |
| Company based in | United Kingdom | United States |
| Apple Watch | 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 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
What Glow does
People who want to monitor their cycle and ovulation, particularly those trying to conceive; partners can be invited to track alongside.
- 🌷 Forecasts of your next period and most fertile days
- 📝 Log BBT, LH tests, cervical mucus, mood and symptoms to refine predictions
- 📷 Scan Glow's own ovulation test strips with your camera; other brands are entered by hand
- 🌡️ Readings from the Glow basal thermometer sync automatically
- 💞 Invite your partner to log too and share a period calendar
- 💬 Discussion forums and educational articles
- 🤰 A pregnancy-tracking mode
- 📱 Offline mode that keeps your logged data on your phone
Flo vs Glow: common questions
Flo: there is a free version. Glow: there is a free version.
Flo's paid plan is listed at $1.99 to $59.99. Glow's is listed at $59.99/year, $29.99 every 3 months or $99.99 lifetime. Prices change and differ by country; each listing shows where and when we read them.
Flo says it does not sell personal data for money. Glow says it does not sell personal data for money. This is what each company states in its own policy, not an audit.
Flo: offers an anonymous mode: data is stored on its servers without your name or email. Glow: offers a mode that keeps your data on your device.