Glow vs Premom: how do they compare?
Glow and Premom are both listed on HerFound, and both carry facts sourced from their own pages. Same for both: there is a free version. Glow: says it does not sell personal data for money; Premom: says it does not sell personal data. 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
 Glow |  Premom | |
|---|---|---|
| What it is | A fertility and ovulation tracker: period forecasts, partner sharing and community forums | An ovulation and fertility tracker: reads your ovulation test strips and charts your cycle |
| Price model | Freemium | Freemium |
| Platforms | iOS, Android | iOS, Android |
| Free version | There is a free version. | There is a free version. |
| Paid plan | $59.99/year, $29.99 every 3 months or $99.99 lifetime | $12.99 to $37.99 |
| Selling personal data | Says it does not sell personal data for money. | Says it does not sell personal data. |
| Advertising | Says some data is used or shared for advertising. | — |
| Where your data is kept | Offers a mode that keeps your data on your device. | Your data is stored on the company's servers. |
| Deleting your data | You can ask the company to delete your data. | You can ask the company to delete your data. |
| Company based in | United States | — |
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 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
What Premom does
People trying to conceive who want to time ovulation using test strips, temperature and cycle data, including those with irregular cycles or PCOS.
- 📷 Photograph an ovulation test strip and get an LH value
- 📈 One fertility chart for LH, BBT, cervical mucus and symptoms
- 🌷 Period, fertile window and ovulation day predictions
- 🧪 Log PdG (progesterone marker) test results
- 🌡️ Syncs with the company's basal thermometer
- 🤰 Pregnancy mode with week-by-week tracking after a positive test
- 💞 Predad partner sharing of the cycle or pregnancy details you choose
- 💬 Community, virtual consultations and expert articles
Glow vs Premom: common questions
Glow: there is a free version. Premom: there is a free version.
Glow's paid plan is listed at $59.99/year, $29.99 every 3 months or $99.99 lifetime. Premom's is listed at $12.99 to $37.99. Prices change and differ by country; each listing shows where and when we read them.
Glow says it does not sell personal data for money. Premom says it does not sell personal data. This is what each company states in its own policy, not an audit.
Glow: offers a mode that keeps your data on your device. Premom: your data is stored on the company's servers.