Decode the menopausal shift with NC°

Perimenopause stage assessment

Actionable daily insights

Advanced cycle & symptom analysis

Powered by temperature data

Measure key biometrics

Natural Cycles integrates with multiple measuring devices, including the NC° Band, Apple Watch, and Oura Ring. Measure while you sleep and sync data directly in the app.

Get daily insights

Our science-backed app transforms data into actionable insights — helping you track your fertility and spot irregularities as you move through perimenopause.

Decode hormonal shifts over time

Measuring consistently can help you see the wider picture of perimenopause. Identify patterns and learn more about the link between your hormones and symptoms.

Inside NC° Perimenopause

Driven by the first-of-its-kind menopause algorithm and packed with smart features to support you.

Feel safe knowing your data is protected

NC° Secure is our comprehensive privacy protection program, included with every subscription.

Secured data emoji

Common questions

Own your body’s next chapter

NC° Perimenopause is here to support you with wellness insights and information. It’s not a diagnosis — we always recommend consulting with your own doctor for medical advice.

Natural Cycles is available as a method of birth control in the US and territories; Canada; United Kingdom; Ireland, France; Germany; Netherlands; Luxembourg; Belgium; Spain; Portugal; Austria; Switzerland; Italy; Latvia; Lithuania; Malta; Estonia; Sweden; Denmark; Norway; Finland; Iceland; Bulgaria; Czech Republic; Hungary; Poland; Romania; Slovakia; Greece; Cyprus; Croatia; Slovenia; Montenegro; Singapore; Australia; Brazil. Outside these countries listed, Natural Cycles is intended to be used for fertility monitoring.