Discover how easy natural family planning can be!
Natural family planning refers to taking your daily temperature in order to determine your fertile days, to then consciously induce a pregnancy. How can you determine your fertile days? Daysy is a highly developed fertile days calculator. Calculating your fertile days with Daysy is comfortable, quick and accurate. Natural family planning does not get any easier than that!
Knowing when you are fertile is the most important prerequisite for planning a pregnancy. Daysy helps you to figure this out. Daysy does not interfere with your natural female rhythm one bit.
Fertile days calculator Daysy: Take your temperature in 60 seconds
One of Daysy's big advantages is its high precision sensor that takes your basal temperature in under 60 seconds. Measure in the morning while you are still in bed and have your fertility status be determined with a very high accuracy . This high degree of accuracy would not be possible without Daysy's unique algorithm, built from the knowledge of 5 million recorded and analyzed cycles. More than 30 years of research and development have gone into making it. You can benefit from all that every day when you are using Daysy.
Compact design and clear color display
Daysy is not only quick in taking your temperature, it also displays the result quickly and clearly. Red light means you are currently fertile / possibly fertile and green light means infertile. When the red light is blinking, you are ovulating. If Daysy is showing you a yellow light, it means that she is still getting to know your cycle or that your cycle might be somewhat irregular. Just treat the yellow days like red days.
You will be excited to see how small Daysy is: The device will fit into your smallest bag, even the pocket of your pants. It is hardly bigger than a conventional thermometer. If you are after more information regarding your cycle than is displayed on the device, you can additionally install the free app "DaysyDay" on your smartphone. "DaysyDay" gives you an overview of your current cycle data, lets you study your temperature curve and check out a prognosis of next month's fertile and infertile days.
With the fertile days calculator Daysy and the official app, everything you need to know about your cycle for natural family planning is right where you are!
For optimal use of Daysy, we recommend that you should have slept sufficiently (at least one hour) before the measurement. It is important that you take your temperature immediately after waking up, before getting up and becoming active. Measure below your tongue, with your mouth closed, and keep the device steady while it is measuring. Video Tutorial
No. You should have at least one hour of good quality sleep before the measurement. It is important that you take your temperature immediately after waking up, before getting up and becoming active. For optimal use of Daysy, try to get at least 3 or more hours of sleep before measuring. Less sleep can result in more temperature fluctuations causing Daysy to give more fertile or potentially fertile days.
You can confirm or remove menstruation at any time during the current day. Simply press the button to turn on your Daysy, and then press and hold the activation button until the violet light lights up without flashing and you hear a "beep." Confirm you are menstruating for each day of active bleeding and for a minimum of three consecutive days. You can also remove menstruation data for the same day by turning Daysy on and pressing and holding the activation button until the purple/blue light is no longer solidly lit and begins flashing again.
The first 2-4 cycles of use are considered Daysy's learning phase. Over the course of her learning phase, Daysy will come to understand your cycle and begin narrowing down your fertile window. Daysy remains quite cautious and conservative during this time, which is why Daysy is accurate starting the very first day.
You can rely on Daysy's results starting the very first day of use. In the beginning, you will see more yellow and red days because Daysy is still learning your unique cycle. You will see more green days as Daysy comes to understand your cycle and can narrow down your fertile window. The more regularly you measure, the better.
Yes. Irregular cycles are not a problem for Daysy/Lady-Comp. Even with irregular cycles, all Valley devices distinguish between non-fertile and fertile days with a very high accuracy. However, in case of extreme fluctuations between cycles it will give you more red and yellow lights and less green lights. Fluctuations of several days are usually not a problem. If you have questions about your unique cycle, please reach out to our team of experts.
No! DaysyDay is free! There are no in-app purchases or upgrade fees.
In general, you should skip measurements during illness and while you are taking medication that can have an influence on your body temperature or cycle. If you have doubts, contact your doctor or our customer service team.