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How does it work?

You can only get pregnant 6 days each cycle. The algorithm behind the NC° app uses body temperature to find these days.

The algorithm learns the pattern of your cycle, giving a daily fertility status, so you can prevent pregnancy hormone-free!
What do I need to do?
Measure your temperature
Open the NC° app
Confirm daily fertility status
How does Natural Cycles compare to other methods?
HORMONAL
HORMONAL
93%
Contraceptive Pill
93%
Vaginal Ring
99%
Hormonal IUD
NON-HORMONAL
93%
Natural Cycles°
87%
Condom
99%
Copper IUD
NON-HORMONAL
Percentage of typical users who did not get pregnant with the method over 1 year of use. Read more.
Common questions
Yes, you can now use your Apple Watch with Natural Cycles as long as your watch has a temperature sensor (Apple Watch Series 8 and higher). Just sign up, download the NC° app, and connect your watch in the "My Device" page.
If you already have an Oura Ring, you can connect it to the NC° app in the “My Device” page. If you don’t have a ring, purchase your Natural Cycles subscription, download the NC° app, and visit the “Buy extra supplies” page to claim your exclusive discount on an Oura Ring purchase.
Once you sign up for Natural Cycles you’ll be able to access your exclusive discount on a brand new Oura Ring.
Natural Cycles is powered by an algorithm that analyzes daily hormone-driven temperature changes to confirm each day if you are fertile and need to use protection (Red Day) or if you’re not fertile (Green Day).
Absolutely. Natural Cycles goes beyond birth control. Learning about your cycle also gives you the power of knowing when it’s the best time to conceive. NC° Plan Pregnancy tells you the days when you are most fertile, and it can also let you know when it’s the optimal time to take ovulation or pregnancy tests. Once you log a positive test in the app, you can start using NC° Follow Pregnancy – here, you’ll get regular updates on the progress of your pregnancy.
To use NC° Plan Pregnancy, you need to measure your body temperature, input your temperature and period data, and then the Natural Cycles algorithm will provide your daily fertility status. In NC° Plan Pregnancy, the fertile window is presented in a scale of red colors, where the most fertile day has the darkest shade of red, and the lightest red color indicates that fertility is less likely. Non-fertile days have a light green color.
Natural Cycles gives you the information you need to time intercourse and maximize your chances of conceiving. Research shows that couples using Natural Cycles get pregnant in 3 cycles on average.
Your journey starts today
You must be over the age of 18.Does not protect against STIs.
FDA Cleared
Natural Cycles is 93% effective with typical use, 98% effective with perfect use. No method of contraception is 100% effective. Natural Cycles does not guarantee that you cannot get pregnant, it only informs you whether and when you can become pregnant based on the information that you enter into the application.
