Introducing NC° Birth Control

Discover non-hormonal birth control that’s side-effect-free

Switch to the only FDA Cleared and CE marked birth control app

Learn the unique pattern of your cycle with tailored updates and insights

Let's compare birth control effectiveness



A package of contraceptive pills


Contraceptive Pill

the contraceptive ring


Vaginal Ring

The hormonal IUD


Hormonal IUD


A phone with the nattural cycles app


Natural Cycles°

illustration of a male condom



Copper iud


Copper IUD


Percentage of typical users who did not get pregnant with the method over 1 year of use.Read more.

Take our quiz to find out if Natural Cycles works for you!

What’s your goal?

Measure.Open the app.Confirm your fertility status.

Use NC° with an Oura Ring

You can now measure overnight! Wear the ring to bed, and let it measure while you sleep. No need to set an alarm, the data syncs automatically.


Hear from our community

image of lexi


Cycler since March 2021

To me Natural Cycles is not just hormone-free birth control, it is also one of the greatest tools I’ve come across to help me learn about my body.

Read story

The science ofyour cycle

Natural Cycles birth control is based on biology. Discover the science behind this method, and what makes us certified.

Woman showing her Natural Cycles app to her partner.

You can also plan pregnancy

Natural Cycles is with you every step of your fertility journey. If you’re ready to start a family just switch to NC° Plan Pregnancy.

Common questions

NC Secure

Your data is always protected

Join the revolution

Your hormone-free journey awaits

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.