The only FDA Cleared birth control app

Temperature-based contraception that’s free from hormones and side effects.

No hormones or
side effects
FDA Cleared
as contraception
Adapts to your
cycle

Let's compare birth control effectiveness

HORMONAL

Contraceptive Pill 93%
Vaginal Ring 93%
Hormonal IUD 99%

HORMONAL

Natural Cycles° 93%
Condom 87%
Copper IUD 99%

Inside the NC° app

View your fertility status

It’s easy to see if today is a Green or Red Day so you know if you need to use protection.

Track and learn more

Monitor emotional and physical symptoms to learn about the changes in your body.

See the bigger picture

Spot patterns and compare previous cycles with your graph view.

Adapt your fertility journey

Smoothly switch between preventing or planning pregnancy at no extra cost.

Natural Cycles can help you

Plan Pregnanacy

Track Symptoms

Unlock Insights

How does Natural Cycles work?

Backed by science, the NC° algorithm is powered by body temperature.

How to use Natural Cycles

Measure your temperature

Choose your device and measure either overnight or in the morning.

Open the NC° app

The algorithm behind the app is analyzing your body temperature.

Confirm your fertility status

At a glance, know if today is a Green Day (not fertile) or a Red Day (use protection).

Body temperature and the cycle

Our hormones cause body temperature to rise around ovulation. By analyzing this we can pinpoint where you are in your cycle.