Temperature-powered birth control starts here
Upgrade to get 20% off the NC° Annual Plan and unlock deeper fertility insights using your body temperature, 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
Get started in 3 easy steps
What’s your relationship with your cycle?
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.