Basal thermometer (Celsius)


Basal thermometer (Celsius)

To get started with Natural Cycles, you need a basal thermometer. This is a regular digital thermometer but with higher sensitivity than a classic fever thermometer. It measures to a two decimal point, i.e. 36.65° C, which is required in order for the algorithm to find your ovulation. Our thermometer also has a built-in memory feature of your last measurement.

Tip: Our basal thermometer is included when you purchase an annual subscription as a new user, so you might not need to order one.

Usage: Measure your temperature every morning when you wake up and enter the temperature in Natural Cycles app. A booklet is also included for further instructions of use.

Battery included: Of course our thermometer comes assembled with a long life battery. We still recommend you to buy an extra battery so you are not left without the day it runs out. You will find one here.

This thermometer is in Celsius and is CE-marked. The thermometers are manufactured by UEBE Medical Gmbh.

We also provide thermometers in Fahrenheit.

Unfortunately, we can not ship this product to some countries. Please read more here.


Natural Cycles is a 93% effective, natural method of contraception that is delivered in the form of an app. It uses a smart algorithm that is sensitive to subtle patterns in a woman’s cycle to determine daily fertility, based on basal body temperature.

Natural Cycles is the only app of its kind to be available in Europe and the US for use as a contraceptive

Berglund Scherwitzl E, et al. Contraception. 2017;96(6):420–425.