36 Years Ago Developed by
Dr. Rechberg
Technology you can rely on
Daysy meets the requirements for a medical device. Precision and quality are our top priority.
Valley Electronics AG, based in Switzerland and manufacturer of Daysy, is certified according to EN ISO 13485. All procedures at Valley Electronics AG are regularly audited internally and externally.
Valley Electronics AG is registered with the FDA. The FDA inspects our Zurich office and our suppliers. Our quality management system is audited annually by an independent European Notified Body.
Daysy's Unique Internal Algorithm
Thanks to the internal algorithm in Daysy, your cycle can be calculated quickly and accurately in real time. The algorithm is based on 5 million menstrual cycles and learns your personal cycle, even if your current cycle is different. Gain insight into your cycle.
Valley Electronics produces the Daysy®, LadyComp® and Teena®
Independently Assessed Result
99.4% accuracy
Your measurement is compared by the internal algorithm with fixed data from 5 million menstrual cycles of 500,000 women.
Daysy also learns from your previous cycles. For example, if you ovulate later than normal, your period may also be later. In short, the distribution between fertile and infertile days is carefully determined every day.
When calculating fertile (red) days, Daysy is 99.4% accurate.
For more information:
Publication of the study .
Fact Sheet Study .
International
In 40 Countries
Daysy is used in 40 countries worldwide.
View the list of countries.
Daysy around the World
Gain insight into what your body is currently showing and how your current cycle is progressing in real-time. You can see how the basal body temperature (BBT) is displayed and how ovulation is recognized. BBT temperatures are determined by the different hormones active during your cycle. This creates a difference between the temperatures before and after ovulation.
The internal algorithm takes previously measured temperatures into account to identify outliers and/or measurement errors. Measure consistently and confirm the menstrual days. If you are less consistent, Daysy will give you the yellow color first to get to know your cycle before showing the red (possibly fertile) or green (infertile) color.
Real-Time Information
Measure under the tongue
Daysy has a very sensitive sensor to measure basal body temperature. The most unique feature of this sensor is that it waits for the average temperature value, which takes 90 seconds.
The sensor heats up to get an accurate result. Daysy waits until the final temperature value has stabilized to complete the measurement with the 'beep beep' sound. If the temperature drops during the measurement (for example due to cold air entering the mouth through breathing), the sensor waits until the temperature rises again and stabilizes. This unique feature sets the Daysy apart from less advanced basal body thermometers.