Common questions

Sign up for the Natural Cycles Annual Plan. After you 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.

Your Natural Cycles subscription will be active as soon as you subscribe. This will give you time to familiarize yourself with the Natural Cycles app and complete the onboarding process.

To pair your Natural Cycles app with the Oura Ring, you’ll need a Natural Cycles subscription and an Oura Membership. 

An active Oura Membership ensures that Oura can process specific and necessary data from your Oura Ring. Without an Oura membership, your temperature trends won’t be able to sync with the Natural Cycles app to identify your daily fertility status.

Natural Cycles doesn’t share any sensitive data with Oura. The partnership is a one-way integration. Oura will only share sleep data with Natural Cycles (which includes temperature trends, heart rate, sleep length, and sleep stages) if an Oura user gives explicit consent. If you give this explicit consent, Natural Cycles will have access to your Oura sleep data, but Oura will not have access to any of your Natural Cycles data.  

Natural Cycles is committed to protecting your data – always. We have top security protocols, including encryption and pseudonymization, to keep your data secure. We are a regulated medical device that follows GDPR – and we never (have or will) sell users' data. Learn more about how we protect your data here.

The Natural Cycles algorithm analyzes hormone-driven temperature changes to detect your fertile window. For this reason, tracking your temperature is integral to your NC° experience.

We offer three device options, making it easy to choose one that suits your lifestyle. Temperature data can be collected using the NC° Thermometer (this is different from a regular fever thermometer) or by pairing a measuring device like an Oura Ring or a compatible Apple Watch with the Natural Cycles app. No matter which device you use, the effectiveness of Natural Cycles as a birth control method is the same: 98% with perfect use and 93% with typical use. Visit our devices page to learn which one is right for you.