Natural Cycles:
The First and Only Contraceptive App

The intelligent app that effectively prevents pregnancy without hormones.

You must be over the age of 18
Does not protect against STIs
CE 0123

Make It Your New Morning Routine


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 analyses 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.


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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


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

Find out how it works


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

Read more about regulatory clearances

Your Natural Cycles Subscription Includes:

  • 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.