Know Your Fertility in 3 Quick Steps
When you wake up in the morning, use the Natural Cycles thermometer to take your temperature.
2. Add data
Enter your temperature into the app and let Natural Cycles analyze your unique cycle and identify your fertility status.
3. Check your status
Discover if today is a red day (use protection) or a green day (you’re not fertile - no need to use protection).
When you use Natural Cycles perfectly, the birth control app is 98% effective. Perfect use means using condoms or abstaining from sex on red days (when you’re fertile).Read more about effectiveness
Get to know your body with a hormone-free birth control app, so you can prevent pregnancy on your own terms.Read more about how it works
Natural Cycles is the first and remains the only app to be cleared by the US FDA for the use of birth control. The app is also the only app to be CE marked in Europe.Read more about regulatory clearance
Subscription to hormone-free birth control gives you:
- A personalized daily status that tells you whether it’s a green or a red day
- Personal statistics and increased knowledge of your unique cycle
- Bespoke notifications and messages about PMS, breast exams and more
- Unique understanding of where you are in your cycle, putting you in control of your body