Your body. Your birth control.

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

Bloomberg logo

“A powerful alternative”

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“Best app of 2019”

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“Natural Cycles ticks all the boxes”

Your Natural Cycles journey

What to expect

Two hands holding a phone with the app and a 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 Chimpigny smiling and sitting on a sofa

Check out our frequently asked questions

Are you ready to take control of your cycle?

Natural cycles app with thermometer