Apple Watch, meet Natural Cycles
The UK MHRA Registered contraception app now uses your Apple Watch temperature to help you prevent or plan pregnancy.
What is Natural Cycles?
The Natural Cycles app is a regulated medical device intended to be used to prevent or plan pregnancy. There are only 6 days each cycle you can get pregnant and the Natural Cycles app is able to use body temperature to pinpoint these days.
Way more than a cycle tracker
While tracking your cycle is helpful, period trackers should not be used to prevent pregnancy. Unlike cycle tracking apps, Natural Cycles is able to predict and confirm ovulation using body temperature.
App Store
4.8 stars
58K+ reviews
Supporting
6 million
Cyclers over 10 years
How does it work?
Wear your Apple Watch while you sleep
Wake up and your data will automatically sync
Open the NC° app to see your daily fertility status
How effective is Natural Cycles compared with other methods?
HORMONAL
HORMONAL
93%
Contraceptive Pill
93%
Vaginal Ring
99%
Hormonal coil
NON-HORMONAL
93%
Natural Cycles°
87%
Male Condom
99%
Copper coil
NON-HORMONAL
Percentage of typical users who did not get pregnant with the method over 1 year of use. Read more.
Discover why our users love NC° with 58K+ App Store reviews
Amazing
17 April 2023
Even with my highly irregular cycles, this app has figured me out! It’s done what I never thought could be done. It took a while to learn, a few cycles, but wow, I’m super impressed and will never stop using this app. I also learned a ton about my body. Highly recommend!
Amazing app
14 March 2023
What a resource for women, NC stays on top of current events and helps fund women’s studies. A wealth of information for women. Thank you
Life-changing
8 April 2023
I only wish someone had told me about Natural Cycles before I went through the inferno of a copper IUD! Now I make it my aim to tell all my friends and family about NC… this should be part of sex ed… I have learnt so much about my body and I feel in control of my own fertility. It’s amazing. And my period symptoms have significantly reduced from going all natural. I will be a lifelong member!!
Fantastic App
27 April 2023
This app is brilliant, easily tracks your cycle and identifies your fertile period. I’ve used it for a number of years and found it to be very accurate. It’s helped me understand my cycle better, notice how the different phases affect me and get more attuned to my body’s rhythm. It’s also been highly accurate in predicting pregnancy.
Love this app
14 April 2023
So happy to be off hormonal BC. If you’re diligent in recording your temp, this app is spot on. Worth the annual fee in my opinion!
Been using for over 5 years!
5 March 2023
Natural Cycles is my trusted companion. I’ve been using it since 2017 and I honestly don’t know how I’d live without this tool. Everyone who menstruates needs to get on this. I’ve used both the planning and preventing programmes and after 2 babies it’s definitely proven its accuracy in more ways than one. I can’t wait for the next 5 years on this journey with NC 💕
Discover natural birth control powered by Apple Watch
Common Questions
Great news, Cycler! You can set up your Apple Watch to measure with Natural Cycles by following the instructions in the app, or read more here
The hormonal shifts that are linked to your body temperature are so small they can only be detected while you’re resting. To get the most out of Natural Cycles you should wear the watch for at least four hours a night for five nights a week.
To use an Apple Watch with Natural Cycles, your watch must have a temperature sensor. Devices with temperature-sensing capabilities include Apple Watch Series 8+, the Apple Watch Ultra range, and Apple Watch SE3.
Yes! If you don’t have Apple Watch, you can still make the most of our hormone-free birth control. You can choose to measure overnight with the NC° Band (our best value integration) or using an Oura Ring. Read more about measuring with Oura.