Natural Cycles analyzes your cycle using body temperature as the most important fertility indicator to identify your fertile window. For that reason, tracking your temperature is integral to your NC° experience.
The following devices are compatible with Natural Cycles. Read on to identify which one is the best fit for you!
Basal thermometers
If you're using Natural Cycles with a thermometer, it's essential that you use a basal thermometer. A basal thermometer measures with higher precision since it produces a measurement with two decimal places (regular fever thermometers only measure one decimal place).
With a basal thermometer, you should measure first thing in the morning, right after waking up (before sitting up, drinking water, snoozing, or getting out of bed) because the basal temperature is your resting temperature, and it is lowest when you sleep. Learn more about measuring with a basal thermometer here.
Measuring with a basal thermometer is a good option for people who:
- Have a regular sleeping schedule
- Can measure first thing in the morning daily
We offer two different models of basal thermometers depending on your region and availability.
Basal thermometer
NC° Thermometer Gen1 (Outside the US & Europe)
Bluetooth basal thermometer
NC° Thermometer Gen2 (With Bluetooth function - US & Europe)
Wearable devices
Tracking your temperature just got easier by integrating a wearable device with the Natural Cycles app. Currently, the only wearables Natural Cycles integrates with are the Oura Ring and the Apple Watch*.
*To use an Apple Watch with Natural Cycles, your watch must have a temperature sensor. This includes Apple Watch Series 8 and later, or any model of Apple Watch Ultra.
With a wearable device, you wear the device while you sleep, sync it to the NC° app in the morning, and check your fertility status. This means that you don’t have to worry about having a regular sleep schedule or morning routine – the device does the work for you.
Wearables are a good option for people who:
- Have a regular, irregular, or interrupted sleeping schedule
- Struggle to measure your temperature at the same time first thing every morning
- Value the additional features offered by the Oura Ring or Apple Watch
While we do aim to add additional wearables, given that Natural Cycles is regulated as a medical device by the FDA in the US and CE-marked in Europe, we are held to very high standards of quality and testing before our products reach our users.
Oura Ring
Benefits of using the Oura Ring with Natural Cycle:
- Exclusive discount code for NC° users
- Measure seamlessly overnight
- Charge less frequently
Apple Watch
Benefits of using the Apple Watch with Natural Cycle:
- Fast shipping
- Measure seamlessly overnight
- No membership fee
Device | Availability |
NC° Thermometer Gen1 | Outside the US & Europe* |
NC° Thermometer Gen2 | US & Europe |
NC° Thermometer Gen3 | US (limited availability) |
Oura Ring | Countries where Oura ships |
Apple Watch | Countries where Apple ships |
*Note: To comply with local Australian regulations, the thermometers we ship to Australia are non-branded and different from the NC° Thermometer Gen1 pictured above but offer the same functionalities.