Natural Cycles —
Digital Birth Control

Measure your temperature, enter it into the app and find out if you can or cannot get pregnant today.

You must be over the age of 18 Does not protect against STIs Natural Cycles is 93% effective with Typical Use

Make It Your New Morning Routine


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

Add data

Enter your temperature into the app. Natural Cycles’ smart algorithm analyzes your data.

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.


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Backed by clinical data.
Natural Cycles is 93% effective with typical use, which means 7 women out of 100 get pregnant during 1 year of use. More detailed information in the User Manual.

Read more about the science


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Hormone-free and non-invasive.
Take your temperature as soon as you wake up in the morning and let Natural Cycles’ smart algorithm analyze your data.

Read more about how it works


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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

Your Natural Cycles Subscription Includes:

The first month is free, this gives you the chance to explore the app before you decide if you want to subscribe.

Annual subscription $79.99 ($6.60/month)
  • 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.