Choose the right device for you
Natural Cycles is powered by your body temperature, so you’ll need a compatible measuring device.
One app, three ways to measure
Natural Cycles has been clinically validated for use with all three measuring devices, so focus on finding the best fit for your routine and preferences.
NC° Band
No screen, no flashes, no beeps — just comfort-first measuring that’s cost-friendly.
Oura Ring
Our most popular integration! This sleek smart ring makes measuring effortless.
Discover NC° + Oura
Apple Watch
Seamlessly sync your Apple Watch with NC° to track your fertility with ease.
Discover NC° + Apple WatchCompare Devices
Where to measure
When to measure
Automatic sync
Special pricing
NC° Band
Wrist
Overnight
Yes
Free with Annual Plan
Oura Ring
Finger
Overnight
Yes
Exclusive offer
Apple Watch
Wrist
Overnight
Yes
None
Your temperature & your cycle
After ovulation, your body temperature naturally rises as hormone levels change.
Find out if Natural Cycles is right for you
What the community is saying
Sam
NC° and Oura sync to give me fast, reliable results that can’t be beat.
Oura Ring + Natural Cycles
Chloë
Apple Watch lets me measure without thinking about it. It’s so accurate and easy to use!
Apple Watch + Natural Cycles
Kayla
I’m obsessed with how seamless and empowering this experience is!
Oura Ring + Natural Cycles
Sofia
I could right away understand when I was ovulating and when my period was gonna come.
Apple Watch + Natural Cycles
Common Questions
Yes. However, we recommend only switching to a new measuring device at the start of a new cycle.
Please keep in mind that you should avoid switching measuring devices too often and you can't use two devices at the same time.
As a certified medical device, the Natural Cycles subscription helps keep your data safe. All birth control costs money both to make and supply. Our subscription fee means we can continue offering another hormone-free birth control option and doing research to promote women's health.
If you’re living in the US, the NC° Annual Plan is covered by most major insurance providers, and is available for FSA/HSA reimbursement.
No matter which wearable device you use, your temperature data syncs automatically with the NC° app. You can measure seamlessly while you sleep and see your fertility status when you wake up.
After you sign up for Natural Cycles and complete your purchase, we’ll send you a discount link that directs you to your exclusive Oura Ring offer.
If you’re an existing Natural Cycles user, you can access the discount link on the Buy Extra Supplies page in the Natural Cycles app.
Visit this page to learn more about using Natural Cycles with Oura.
Yes. If you're using a Gen3 Oura Ring or later you will also need to purchase a subscription to Oura to be able to use the integration.
If you already own a model with a temperature sensor, you can get natural birth control powered by your Apple Watch. Download the Natural Cycles app to get started or learn more with our guide to using Natural Cycles with Apple Watch.