Take Control Of Your Fertility

Introducing the world's first and only digital birth control method. Cleared by the FDA and scientifically-proven!

4.8
16k ratings in the App Store
best apps 2019 Heathlineapp showing different fertility statuses

Effectively prevent pregnancy & learn about your body in 3 quick steps

We’ll take care of the rest

1. Measure

When you wake up in the morning, use the Natural Cycles thermometer to take your temperature.

2. Add data

Enter your temperature into the app and let Natural Cycles analyze your unique cycle and identify your fertility status.

3. Learn your fertility

Instantly find out if today is a red or a green day and whether or not you need to use protection.

Featured In

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“A powerful alternative”

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“Best app of 2019”

The New Yorker logo in white

“Natural Cycles ticks all the boxes”

Your Natural Cycles journey

What to expect

Pair of hands with the right one holding a phone with the Natural Cycles app and the left one holding a Natural Cycles thermometer.
First Cycle

Get started

From the first day you add data, our algorithm will provide you with your fertility status. For most users, ovulation is identified during the first cycle.

Second Cycle

Master your routine

The more data you add, the more our algorithm learns. Measure your temperature when you wake up, at least 5 days a week, to get more green days (aka non-fertile days when you don’t have to use protection).

Third Cycle

Keep on Learning

Track your period, ovulation test results, and PMS symptoms to help you learn more about your body, cycle, and reproductive health.

Why women love Natural Cycles

I'm so grateful to Natural Cycles for giving me a powerful, empowering, effective option to understand and work with my fertility.

Kat1 yearKat smiling, wearing a black t-shirt

Subscription to hormone-free birth control gives you:

The Natural Cycles app on the graph screen showing a month of temperature data with the user's period, ovulation, and fertile window
  • A personalized daily status that tells you whether it’s a green or a red day
  • Personal statistics and increased knowledge of your unique cycle
  • Bespoke notifications and messages about PMS, breast exams and more
  • Unique understanding of where you are in your cycle, putting you in control of your body
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.