6+ million users
Take control of your
One app for lifelong wellness — from birth control to perimenopause.
App modes for each stage of your journey
Effective hormone-free birth control
The only FDA-cleared birth control app. Clinically proven to pinpoint fertile days, NC° shows you when to use protection.
Pinpoint peak fertility
NC° Plan Pregnancy identifies your most fertile days, helping increase your chances of a positive pregnancy test.
Track your body’s changes
Science-backed insights & tailored advice, NC° helps you follow the development of your body and baby.
Recover after giving birth
Natural Cycles helps you track your recovery and offers resources so you feel prepared and in control every day.
Simplify perimenopause
Understand your body’s hormonal changes with science, NC° helps you gain clarity and feel more in control.
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
More than tracking, science to support your whole journey
What’s your relationship
with your cycle?
Get more from your cycle
Turn your daily data into the science-backed clarity you’re looking for.
Harness the power of
your natural hormones
Find out what your body can do when you get in sync with the natural shifts of your cycle — without the effects of synthetic hormones.
Know your body,
own your choices
Become the expert of you,
with expert guidance
Unlock a seamless routine
with wearable technology
Effortlessly track temperature and other biomarkers overnight with a wearable integration to get advanced analysis and evidence-based insights.
Adapt the app to your goals as they evolve
The most studied app of its kind
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!
Bethany
Joined in 2023
I’ve experienced significantly less pelvic pain... and our intimacy couldn’t be better.
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.
Katie
Joined in 2022
Nothing short of amazing! We just welcomed our baby girl thanks to NC° 🥰
Trusted by leading
women’s
health experts
Dr. Kerry Krauss
OB-GYN & Senior Medical
Advisor at Natural Cycles
Common questions
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 personalized to your cycle. So, how can it be true to you? Our algorithm significantly reduces 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.
Plus, 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 program designed to keep your data safe. Find out why women around the world choose Natural Cycles.
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!
Birth control costs money to make and supply. A subscription to the Natural Cycles app helps make hormone-free birth control more accessible, giving you more choices to find what works for you — all while supporting women’s health research.
Because we charge a subscription, we don’t need to profit from selling users’ data like some “free” apps do. Natural Cycles is committed to data privacy, and as a regulated medical device, we are required to comply with the FDA’s cybersecurity requirements.
We offer two plans: annual or monthly. Click here to find the right subscription option for you.
Yes. The effectiveness of Natural Cycles is supported by clinical evidence, which shows Natural Cycles is 93% effective with typical use. When used as intended, i.e. if you never have unprotected intercourse on Red Days, Natural Cycles is 98% effective. Read more on the science behind our effectiveness.
Forgetting to measure doesn’t impact how effective NC° Birth Control is at preventing pregnancy. However, if the app doesn’t have enough data due to poor sleep or forgetting to measure, you might get more Red Days (when you’ll need to abstain from sex or use protection).
You don’t have to wait for Natural Cycles to learn your cycle before you can start using it because Natural Cycles is effective from the first day of use!
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.