Start your journey with Natural Cycles x Garmin
FDA-cleared birth control
and so much more
Garmin tracks, the NC° app transforms
your temperature data into fertility insights.
How it works in 3 steps
How to get started
For each stage of your journey
NC° evolves with your life and goals.
Birth Control
Birth Control
Hormone-free, FDA-cleared birth control. Know your fertile days and when you need protection.
Plan & Follow Pregnancy
Plan & Follow Pregnancy
Know your peak fertility to increase your chances, then track changes & baby's growth.
Postpartum
Postpartum
Support after birth. Monitor your cycle's return and track your recovery at your own pace.
Perimenopause
Perimenopause
Understand your body's changes, recognize symptoms, and feel prepared and in control.
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
IUD
Typical use effectiveness rates. Source:
Contraceptive Technology (Table 5-2). 22nd Edition, 2023
Cyclers say it best
58K+ global rating
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.
Michelle
Joined in 2022
I feel empowered knowing about my body’s natural processes.
Chlöe
Joined in 2022
I feel safe and secure with NC and have learnt more about my cycle and body through the app.
Allison
Joined in 2025
I love the educational messages I receive that allow me to take my knowledge to the next level.
The most studied app of its kind
The trusted wearable meets FDA-cleared NC° Birth Control
Common questions
Natural Cycles now integrates with compatible Garmin wearables, turning your temperature data into clear fertility insights inside the NC° app.
Find out if your wearable works with the NC° app and start getting customized daily insights that help you plan and prevent pregnancy.
After you sign up for Natural Cycles and complete your purchase, we’ll send you a discount link that directs you to your exclusive Garmin offer.
If you’re an existing Natural Cycles user, you can access the discount link on the Buy Extra Supplies page in the Natural Cycles app.
Learn more about using Garmin temperature tracking to gain Natural Cycles insights.
Your Natural Cycles subscription will be active as soon as you subscribe. This will give you time to familiarize yourself with the Natural Cycles app and complete the onboarding process.
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, ovulation day variation, sperm survival, and several other essential factors to provide a tailor-made solution for each individual.
Checkout this article for more information about using NC° with irregular cycles.
The Natural Cycles app doesn’t share back information with Garmin. This is a one-way integration, meaning that any data you log in the Natural Cycles app will not sync back with the Garmin app. Always refer to the NC° app for your daily Fertility Status.
Natural Cycles is committed to protecting your data. We have strong security protocols, including encryption and pseudonymization, to keep your data secure. As a regulated medical device, Natural Cycles is required to comply with the FDA's cybersecurity requirements. And as a Swedish-based company, we are designed to comply with GDPR standards, pledging to safeguard your data no matter where you live. Learn more about how we protect your data here.
Natural Cycles is the first and only app of its kind cleared by the FDA as birth control. Many fertility apps are based on a 28-day cycle. This means the fertile window they predict is not personalized to your cycle. So, how can it be true to you? Our algorithm uses your unique temperature and cycle data to significantly reduce the risk of an incorrect fertility status, helping minimize unintended pregnancy and support pregnancy planning with greater precision.
Plus, privacy protection isn’t included with all apps, but it is with your NC° subscription. With NC° Secure, your cycle data is private and secure.
You must be over the age of 18.Does not protect against STIs.
FDA Cleared
Natural Cycles is 93% effective with typical use, 98% effective with perfect use. No method of contraception is 100% effective. Natural Cycles does not guarantee that you cannot get pregnant, it only informs you whether and when you can become pregnant based on the information that you enter into the application.
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.