fertility background
Is Natural Cycles° right for you?

How it works

Choose a device

Use our free thermometer when you sign up. Or sync our app with your Apple Watch or Oura Ring.

Take your temperature

Use your chosen device to take your temperature right when you wake up.

Open the Natural Cycles app

The app shows you your fertility status, cycle trends, and helpful insights.

NC Devices
Measure with NC
Holding NC App
background

How effective are other forms of birth control?

NON-HORMONAL


Natural Cycles°

Natural Cycles App

93%

Copper IUD

Copper IUD

99%

Condom

Condom

87%

HORMONAL


Hormonal IUD

Hormonal IUD

99%

Vaginal Ring

Vaginal Ring

93%

Contraceptive Pill

Contraceptive pills

93%

Natural Cycles

Backed by science, the Natural Cycles° algorithm is powered by your body temperature.

Inside the app

unlock

Unlock

Our FDA Cleared algorithm uses your temperature to identify fertile and non-fertile days.

trackers

Track

Log mood, energy, and more to see how your cycle impacts you.

ovulation prediction

Learn

Customized insights and expert content to help you understand your unique experience.

Hear directly from Cyclers like you

4.8

40K+ ratings in the App Store

Michelle

Michele

I feel empowered knowing about my body’s natural processes.

NC° Birth Control

Bethany

Bethany

I’ve experienced significantly less pelvic pain... and our intimacy couldn’t be better.

NC° Birth Control

Dr. Katara

Dr. Katara

Has got to be THE best natural birth control on the market. 10/10 recommend!

NC° Birth Control

Shadow

Shadow

NC° helped me understand my body, cycle, and the best time of the month to get pregnant.

NC° Plan Pregnancy

Katie

Katie and her family

Nothing short of amazing! We just welcomed our baby girl thanks to NC° 🥰

NC° Plan Pregnancy

Join Our Community

#NaturalCycles

😅🫣 Follow the link in our bio for a quick Sunday read about the history of labeling women's body parts 🔗💬Feeling spooked the first time you heard about NC°? 🤡 NC° Birth Control is more than an app. It’s a certified medical device that’s regulated by official bodies ☝️ And while apps can get a bad rep when it comes to data privacy, one of the reasons we charge a subscription fee is to protect our users 🔒 We take your data privacy very seriously and will never monetize your data by selling it to third parties.⁠
⁠
As a regulated medical device, Natural Cycles is subject to rigorous testing and yearly audits 🔍 Our FDA clearance is based on the analysis of more than 15,000 women over 180,000 cycles. We are constantly monitoring the app’s performance to ensure our Pearl Index remains constant and our effectiveness rate remains the same 📲⁠
⁠
Follow the link in our bio to learn more 🔗"We are finally able to observe changes to the brain in real time." Emily Jacobs, study author and neuroscientist, from the University of California, Santa Barbara, says. Follow the link in our bio to read the full article 🔗🧠Your fallopian tubes are one of the crucial parts of your reproductive system - but how often do you give them any thought? 👀 Follow the link in our bio to learn more about the small but mighty fallopian tubes 🔗

Common questions

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.