How does Natural Cycles work?
Backed by science, the NC° algorithm is powered by body temperature.
How to use Natural Cycles
Measure your temperature
Choose your device and measure either overnight or in the morning.
Open the NC° app
The algorithm behind the app is analyzing your body temperature.
Confirm your fertility status
At a glance, know if today is a Green Day (not fertile) or a Red Day (use protection).
Body temperature and the cycle
Our hormones cause body temperature to rise around ovulation. By analyzing this we can pinpoint where you are in your cycle.
A method that’s tailored to you
Not only can we confirm ovulation but we can predict it, based on your unique cycle.
See how the algorithm works:
Your cycle starts on the first day of your period. Most of us aren’t fertile at this time so you will get Green Days.
Inside the NC° app
View your fertility status
It's easy to see if today is a Green or Red Day so you know if you need to use protection.
Track and learn more
Monitor emotional and physical symptoms to learn about the changes in your body.
See the bigger picture
Spot patterns and compare previous cycles with your graph view.
Adapt your fertility journey
Smoothly switch between preventing or planning pregnancy at no extra cost.