Place the thermometer under your tongue and measure your temperature as soon as you wake up in the morning.
Enter your temperature into the intelligent app. Natural Cycles’ analyzes your daily data as it gets to know your unique cycle.
The app will tell you if it's a red or a green day and whether or not you need to use protection to prevent pregnancy.
Backed by clinical data. Natural Cycles is 93% effective with typical use and 98% effective with perfect use.Read more about effectiveness
A hormone-free birth control app that understands your body so you can prevent pregnancy on your own terms.
FDA cleared in the US and CE marked in Europe.
The first digital method of birth control available in both the US and Europe.
Try hormone-free birth control for 4 months with a full money back guarantee. Offer available for a limited time only!