Natural Cycles:
The First and Only Birth Control App

The intelligent app that effectively prevents pregnancy without hormones.

You must be over the age of 18Does not protect against STIsNatural Cycles is 93% effective with typical use and 98% effective with perfect use

Make It Your New Morning Routine

Measure

Place the thermometer under your tongue and measure your temperature as soon as you wake up in the morning.

Add data

Enter your temperature into the intelligent app. Natural Cycles analyzes your daily data as it gets to know your unique cycle.

Check your status

The app will tell you if it's a red or a green day and whether or not you need to use protection to prevent pregnancy.

Remember: predictions are a forecast of the coming days. You will have an idea of your fertility status, but it may change as the algorithm updates.

Effective.

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Backed by clinical data. Natural Cycles is 93% effective with typical use and 98% effective with perfect use.

Read more about effectiveness

Intelligent.

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A hormone-free birth control app that understands your body so you can prevent pregnancy on your own terms.

Read more about how it works

Recognized.

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FDA cleared in the US and CE marked in Europe. The first digital method of birth control available in both the US and Europe.

Read more about regulatory clearance

Discover the Natural Cycles Starter Kit Offer:

Try hormone-free birth control for 4 months with a full money back guarantee. Offer available for a limited time only!

4 month subscription$34.99Oral basal thermometer included
  • Daily fertility status - find out where you are in your cycle
  • Cycle predictions - take a look at what your upcoming months can look like
  • Statistics - take a deep dive into your personal stats, get to know your cycle in a unique way
  • Valuable messages and notifications about your unique cycle - receive personal notifications about PMS, breast exams, and more
  • Deeper understanding of your body - learn about the different phases of your cycle and what that means for you and your body
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.