Temperature-powered birth control starts here
Get 20% off the NC° Annual Plan to unlock deeper fertility insights, NC° Band included.
Effective NC° Birth Control using your temperature
100% natural birth control
Free from hormones and side effects
Status tells you when to use protection
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
How to use Natural Cycles
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!
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.
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:
1. Sign up for Natural Cycles (purchase a subscription and measuring device)
2. Download the app
3. Follow the steps to set up your device
4. 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 a typical use effectiveness rate of 93% and a perfect use effectiveness of 98%. Read more on the science behind our effectiveness.
Natural Cycles is a regulated medical device that follows GDPR and is committed to safeguarding your data with the highest level of security and encryption. Protecting user information has always been a top priority for Natural Cycles. Now more than ever, sensitive data requires greater protection and regulation, which is why you can rest assured we will continue to ensure your data is always kept secure. Visit our data security page.