March 31, 2026

Sleep. Sync. Unlock.

Garmin users with select smartwatches can now integrate their temperature data with the FDA-cleared Natural Cycles app.¹

Here’s how you can use your Garmin smartwatch with the Natural Cycles app.    

What is Natural Cycles?

The Natural Cycles (NC°) app is an FDA Class II medical device designed to prevent and plan pregnancy naturally. It analyzes body temperature and other key fertility indicators to determine each user’s unique daily fertility status and provide personalized cycle insights.

This hormone-free birth control app helps women know their fertile days and when they need protection.

How does Natural Cycles integrate with Garmin?

Your hormones fluctuate throughout your cycle, causing your body temperature to rise after ovulation and decrease during your period. Tracking your skin temperature overnight provides a glimpse into those changes. While Natural Cycles users sleep, their compatible Garmin smartwatch tracks their skin temperature throughout the night, automatically syncing to the Garmin Connect™ app and sending the data to the NC° app in the morning. The NC° app then generates personalized daily insights, helping women take control of their fertility from birth control to pregnancy planning and beyond.

Why is this helpful for you?

By considering factors such as menstrual cycle irregularities, temperature changes and hormone fluctuations, the Natural Cycles app delivers customized fertility insights, helping users better understand their reproductive health at each stage.

Browse compatible Garmin smartwatches today. And whether you’re looking to prevent pregnancy, plan pregnancy faster, or just learn more about your body, start by learning more about Natural Cycles.

¹_{Compatible Garmin smartwatches are consumer wellness devices and are not medical devices intended to diagnose, treat, prevent or monitor medical conditions. The Natural Cycles app independently determines fertility status based on skin temperature and other data.}