Clue vs Natural Cycles: how do they compare?
Clue and Natural Cycles are both listed on HerFound, and both carry facts sourced from their own pages. Clue: there is a free version; Natural Cycles: there is no free version. Clue: says it does not sell personal data; Natural Cycles: says it does not sell personal data for money. Last checked Nov 11, 2026.
Updated . We don't pick a winner or publish ratings. This sets out what each company says, side by side.
Side by side
 Clue |  Natural Cycles | |
|---|---|---|
| What it is | A period tracker: cycle tracking with predictions for your period, PMS and ovulation. | A hormone-free birth control app: FDA-cleared and based on your body temperature. |
| Price model | Freemium | Subscription |
| Platforms | iOS, Android | iOS, Android |
| Free version | There is a free version. | There is no free version. |
| Paid plan | $9.99/month or $39.99/year | $21.99/month or $149.00/year |
| Selling personal data | Says it does not sell 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 | You need an account to use it. | — |
| Where your data is kept | Your data is stored on the company's servers. | Your data is stored on the company's servers. |
| 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 | Germany | — |
| 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 Clue does
Everyone with a cycle, Clue says, across life stages from a first period to perimenopause.
- 🩸 Period and cycle tracking with period, PMS and ovulation predictions
- 📝 Log symptoms, mood and other cycle experiences
- 🔄 Track your cycle even without menstrual bleeding
- 🌱 Clue Conceive mode with fertile window predictions (Clue Plus)
- 🤰 Pregnancy and perimenopause modes (Clue Plus)
- 💞 Clue Connect to share your cycle with another person (Clue Plus)
- ⌚ Connect a wearable for temperature and sleep data (Clue Plus)
What Natural Cycles does
Adults over 18 who want hormone-free birth control, or support with planning a pregnancy, pregnancy, postpartum and perimenopause.
- 🌡️ NC° Birth Control: a daily fertility status from your temperature and cycle data
- 🌱 NC° Plan Pregnancy: identifies your most fertile days
- 🤍 Modes for following a pregnancy, postpartum and perimenopause
- ⌚ Overnight temperature from the NC° Band or compatible wearables like Oura Ring and Apple Watch
- 📝 Log symptoms, mood and energy
- 💞 A partner view of your cycle phase and fertility status
- 📚 Cycle insights and an education library
Clue vs Natural Cycles: common questions
Clue: there is a free version. Natural Cycles: there is no free version.
Clue's paid plan is listed at $9.99/month or $39.99/year. Natural Cycles's is listed at $21.99/month or $149.00/year. Prices change and differ by country; each listing shows where and when we read them.
Clue says it does not sell personal data. Natural Cycles says it does not sell personal data for money. This is what each company states in its own policy, not an audit.
Clue: your data is stored on the company's servers. Natural Cycles: your data is stored on the company's servers.