Contraception built around you.

An FDA Cleared, non-hormonal, non-invasive way to take control of your fertility.

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
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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%

fertility background
Is Natural Cycles° right for you?
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

it's like a Pandora's box ✨🤯The Natural Cycles Team is made up of people from 20+ different countries with backgrounds in everything from astrophysics to creative writing ✨ Together we share a passion for science, data and female health 🫶 ⁠⁠With a caring and supportive culture, we’re proud to be part of a predominantly female team working for something we really believe in 💜💪Typical use reflects how birth control is used by real people in real life. As well as method failure, typical use also incorporates user error. This includes:⁠
🌶️ The method being correctly used every time the couple have sex⁠
💬 The method is correctly used, but not used every time a couple has sex⁠
👀 The method is used, but sometimes incorrectly⁠
🫣 The method is used incorrectly or is forgotten to be used⁠
⁠
As you can see, typical use provides room for error - hence why the failure rate is usually higher than perfect use. This is particularly true for methods that require work from the user, for example, male condoms have a typical use of birth control effectiveness of 87%⁠
⁠
Follow the link in our bio to learn more 🔗In fact, period colors can vary depending on what stage you’re at in your cycle and whether there are any other health concerns. Follow the link in our bio to learn more 🔗

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.