Birth control without hormones or side effects

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Go hormone-free today

FSA & HSA
Eligible

4.8

40k+ ratings in the App Store

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

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.

Take our birth control quiz

Are you able to wear a measuring device while you sleep or measure your temperature when you wake up?

Are you 18 years of age or older?

Choose the primary birth control method you are currently using:

Have you ever experienced any side effects from birth control?

Do you work night shifts or does your sleep schedule change significantly?

Do you have children?

Are you currently breastfeeding?

Are you looking to become pregnant in the next few years?

Do you like learning about your body?

How long are your menstrual cycles normally?

Do you have  any of the following?

Polycystic ovary syndrome (PCOS)
Thyroid condition
Endometriosis
None

Do you have symptoms of menopause?

Are you and your partner willing to abstain from sex or use condoms on fertile days?

Do you value having a daily routine?

Common questions

Can I use my Apple Watch with Natural Cycles?

How do I use Natural Cycles with an Oura Ring?

How does Natural Cycles calculate my Red or Green Days?

Can I use Natural Cycles to get pregnant?

Your journey starts today

Go hormone-free

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.