Bring your cycle into focus
Natural Cycles is the only app that delivers FDA-cleared contraception, personalised cycle insights, and so much more.
How to use your NC° Band
What’s included
NC° Band
with nylon strap
USB-C
charger
1-year
warranty
Tech specifications
(1.8 × 0.8 × 0.5 in)
How effective is
NC° Birth Control?
98% when used as intended,
93% with typical use.
NC° is in the same effectiveness category as
the pill with zero side effects.
Condom
NC°
The Pill
Coil
Typical-use effectiveness rates. Source:
Contraceptive Technology (Table 5-2). 22nd Edition, 2023
Support for each stage
NC° evolves with your life and goals.
Hormone-free, FDA-cleared birth control. Know your fertile days and when you need protection.
Know your peak fertility to increase your chances, then track changes and your baby's growth.
Support after birth. Monitor your cycle’s return and track your recovery at your own pace.
Understand your body’s changes, recognise symptoms, and feel prepared and in control.
Cyclers say it best
58K+ global ratings
Ida
App Store review
With NC°’s own band, tracking temperature overnight is super easy. It’s great!
NC° Band x NC°
Sally
App Store review
Lifer and never going back. I am using the NC° Band right now, it’s amazing.
NC° Band x NC°
Dr. Katara
Joined in 2021
Has got to be THE best natural birth control on the market. 10/10 recommend!
Shadow
Joined in 2019
NC° helped me understand my body, cycle, and the best time of the month to get pregnant.
Bethany
Joined in 2023
I’ve experienced significantly less pelvic pain... and our intimacy couldn’t be better.
Tracking your fertility with Natural Cycles just got easier
Wellness Awards
Best Fertility Product
2026 Winner
Wellness Awards
Best Innovator (NC° Band)
2026 Silver
Common questions
To get started:
- Sign up for Natural Cycles
(purchase a subscription and measuring device) - Download the app
- Follow the steps to set up your device
- Start measuring!
Designed for Natural Cycles, the NC° Band tracks your temperature trends while you sleep. Simply put it on your wrist before going to bed, wear it overnight, and open the NC° app in the morning to check your fertility status.
The NC° Band continuously measures your temperature while you sleep. Simply wear it overnight and check your NC° app for insights the next day. No daytime wear is needed.
You can purchase a silicone strap directly through the NC° Shop. They are available as individual accessories, allowing you to customise your look or replace an existing band. The straps are available in two signature colours, glacier (a cool blue) and lilac (a soft purple), in the NC° Shop. A darker purple version of the strap is also available for purchase in the app under the “Buy extra supplies” tab.
Natural Cycles is the first and only app of its kind cleared by the FDA as birth control. Most other fertility apps assume your cycle is 28 days long. This means the fertile window they predict is not personalised to your cycle. So how can it be true to you? Our algorithm significantly lowers the risk of you receiving an incorrect fertility status since it uses your unique temperature data, which reduces the risk of unwanted pregnancy and can even help you plan for pregnancy with greater precision.
Not all period trackers keep secrets — some might even share them. With the Natural Cycles app, your data stays yours. We provide an advanced data privacy protection programme designed to keep your data safe.
Find out why more women than ever are choosing Natural Cycles.
Yes, you can use Natural Cycles with an irregular cycle, and it's just as effective.
Natural Cycles captures your unique cycle patterns by considering cycle irregularity, temperature fluctuations, recent use of hormonal contraception, variation in ovulation day, sperm survival, and several other essential factors to provide a tailor-made solution for each individual.
Check out this article for more information about using NC° with irregular cycles.
Natural Cycles is a registered medical device that users pay to access. An NC° subscription is designed to keep your data safe, but it also means we don’t need to profit from your data like other “free” apps do. With Natural Cycles, you control your data.
The NC° Band is included for free with an Annual Plan. It is also available for purchase separately for $129.99. Natural Cycles is FSA and HSA eligible.
Du måste vara över 18 år.Skyddar inte mot sexuellt överförbara infektioner.
Natural Cycles är 93 % effektiv vid typisk användning och 98 % effektiv vid perfekt användning. Ingen preventivmetod är 100 % effektiv. Natural Cycles garanterar inte att du inte kan bli gravid, den informerar dig endast om och när du kan bli gravid baserat på den information som du anger i appen.
Natural Cycles finns tillgängligt som preventivmetod i USA och dess territorier, Kanada, Storbritannien, Irland, Frankrike, Tyskland, Nederländerna, Luxemburg, Belgien, Spanien, Portugal, Österrike, Schweiz, Italien, Lettland, Litauen, Malta, Estland, Sverige, Danmark, Norge, Finland, Island, Bulgarien, Tjeckien, Ungern, Polen, Rumänien, Slovakien, Grekland, Cypern, Kroatien, Slovenien, Montenegro, Singapore, Australien och Brasilien. Utanför dessa länder är Natural Cycles avsett att användas för att övervaka fertilitet.