Daysy - fertility tracker

Get to know your body with Daysy - the fertility tracker

With Daysy you can get to know your cycle and your body in a new way. Fertility tracker Daysy offers you a natural method to track your cycle and to accurately determine your infertile days!

Thanks to the advanced technology based on more than 30 years of research and 5 million cycle data, Daysy calculates for you your infertile phase easily, simply and accurately.

Why a fertility tracker will make your life much easier in many ways


  • ... from now on you would know when you´re infertile!
  • ... you could leave mood swings and other side effects behind you!
  • ... you would no longer have to keep time-consuming and complicated cycle charts!
  • ... and you could finally be in harmony with your own body!


Rather than consistently recording your cycle month after month (including complicated calculations and the worry of whether everything has been correctly noted down and analyzed), being in the know about your menstrual cycle can be much easier and natural at the same time.


Daysy - the smart digital fertility tracker with the simple color system


Daysy offers you a simple, easy-to-use method that allows you to get to know your cycle better – without tables, formulas, and calculations!


Daysy helps you...

  • ... to bring spontaneity and flexibility into your love life.
  • ... to attain higher awareness of your own body.
  • ... to get to know your body's rhythm and to trust it.
  • ... to determine exactly when you are infertile.
  • ... to plan an intended pregnancy when the time is right for you.


Meet Daysy - your personal fertility tracker!

With fertility tracker Daysy, the choice is yours!

Daysy gives you all the information about your cycle and its individual phases you need in order to understand your menstrual cycle phases in detail. With an accuracy of 99.4%, Daysy will quickly and reliably show you when you are in your infertile phase. And the best part? Daysy works 100 percent naturally and saves you the recording of cycle curves and charts.

As simple as 1, 2, 3...
In only 30-60 seconds a day you are in the know about your menstrual cycle!

In just 3 steps and from 30 to 60 seconds per day, you will know more about your menstrual cycle in the upcoming 24 hours!

  1. Every morning when you wake up, you measure your temperature under your tongue.
  2. Enter if you have your menstruation.
  3. Daysy evaluates your data for the next 24 hours and tells you if you are infertile.

Choose Daysy and get to know yourself and your body better!




Why a fertility tracker like Daysy is the perfect device for today's woman

Daysy is a simple, easy-to-use medical device, designed by women for women. We have recognized the need for a accurate method for family planning on the market and have therefore developed an easy device for you.

We know only too well that today's women are very busy and have no time or patience for traditional methods of family planning. Thanks to Daysy you no longer need to learn NFP (Natural Family Planning) or become an expert in cervical mucus analysis.

You can get started with Daysy anytime, and after just 30 to 60 seconds in the morning you are in full knowledge of your daily fertility status - 100% natural, hormone-free, and harmless.

With Daysy it’s only 3 steps: Wake up – measure – and you’re done!

You can count on Daysy!
Daysy has an accuracy of 99.4% in showing you your infertile days. This accuracy is the result of over 30 years of work carried out by a team of gynecologists, fertility experts, software specialists, and engineers who have analyzed more than 5 million female cycles. The result is an algorithm you can count on!

Daysy is not a contraception. Daysy tells you when you are in your fertile window and when not.


Daysy stands for quality and latest certified technology

Daysy is a medical product. This unique fertility tracker is produced in Europe in compliance with the highest quality and safety standards.

In addition to the device itself, you can also get the app DaysyView for iOS- and Android-based smartphones and tablets. This app allows you to gain more knowledge about your cycle and quickly visualize when you are infertile and when not. Daysy's calendar shows you your daily, weekly, and monthly menstrual cycle status with a simple color system. In addition, you can observe your temperature curve over longer periods of time and make personal notes. With the partner app, you can share your data with your loved one or with your doctor.

We also put emphasis on high quality in service: Our Daysy support team will be happy to provide you with advice and our own wealth of experience to answer your questions. You can also request a free cycle analysis from us. Just send us your data from the app DaysyView and we will provide you with a free cycle analysis!

Because cycle data is very personal and sensitive data, we have established strict rules to protect it. Your data will only be saved if you select the option "Save data online" in our app DaysyView. We only store the cycle data, not your personal data, which could be used to identify you. This way you can confidently access your own data without having to worry about third parties gaining access to your personal information.


These are the benefits:

Choose Daysy and enjoy...

  • Easy handling and use: wake up, measure, done!
  • No more cycle curves, no more estimating and hoping – Daysy will do the work for you!
  • Feel better in your body – find your inner balance!
  • You get to decide about your body and your health.
  • With Daysy, the choice is yours.

Are you ready for simple and natural family planning, withoutdetrimental hormonesand withouttedious manual chartingand analysis? Discover Daysy and its reliable, easy-to-understand display of your fertile and infertile days:




Why women trust fertility tracker Daysy

Daysy builds on more than 30 years of research and various studies commissioned by Valley Electronics. Our first product, the Lady-Comp, is one of the most successful fertility trackers of our time. Based on years of experience with the Lady-Comp, continuous research and development, Daysy was launched in May 2014. Since then, thousands of women worldwide have been using fertility tracker Daysy.

Who is Daysy designed for?

Daysy is for all women who…

  • …want a completely natural method of.
  • …have the desire to have children.
  • …want to experience their body as it is.

Daysy is the ideal way for any woman to determine her infertile days! If you are looking for a easy-to-use, hormone-free, and completely natural method for family planning, you have found the perfect answer in fertility tracker Daysy!


This is what our Daisies say:

Investing in my Daysy has been the best decision I have ever made for my health, both physical and emotional. I love being in control of my fertility without medication and side effects. I feel empowered and knowledgable about not just my own cycle but other women's too, and one of the best things is that I can spot exactly when menstruation is coming and am more gentle with myself as a result. Now when my husband and I get some alone time, all he needs to ask is 'red or green?' And we are on the same page. -- Lucy

I absolutely love my Daysy. I can finally take control of my own fertility and not worry about any nasty side effects from birth control. Plus it is super fun to sync with my phone and check out all my charts! -- Abbas

Investing in my Daysy is one of the best decisions I've ever made. My health and life changing effects aside, the customer service at Daysy is the best I've ever received. Each time I've ever had a question and emailed them they get back to me right away and are so clear with their answers. They go out of their way to support you in anyway you need. I highly suggest purchasing a Daysy to any woman! -- Jess

One year ago I made one of the best decisions of my life. I believe every women should have the right to choose what method is best for her lifestyle & body, and the fertility awareness method is hands down the best one for me. I am forever grateful for this method and the freedom it gave me from my horrible experience with hormonal birth control. I have a whole new level of love and trust for my body. -- Elle

In LOVE with my Daysy. It’s been a game changer in our marriage as we made the choice together for me not to use hormonal birth control. Not only has it kept us from getting pregnant, it’s also taught me a lot about my own body! Knowledge is power, friends! -- Laura

Daysy will tell you if you're fertile or not~ For the past 3 years, due to my PMDD and Dysmenorrhea, I have started to learn EVERYTHING I can about the menstrual cycle and women's health, and this little machine sure has helped me in my ongoing endeavor to reclaiming control of my body and mental health. While making me feel safe, comfortable in my own body, and confident in knowing my cycle and working with it. -- Helene


Receive free cycle analyses including printed reports at any time! Just send our team your data from the app daysyView and we'll email you a free cycle analysis, along with suggestions and tips concerning your cycle. We'll help you with any questions you may have.

Daysy tells you when you are in your infertile phase and when not. 




Price & Guarantee

  • Many HSA and FSA health plans cover at least part of the cost - check your plan!
  • Each Daysy comes with a 2-year, limited Manufacturer’s Warranty AND
  • An unconditional Money Back Guarantee! If you aren’t completely satisfied with your Daysy, return to us within 14 days for a full refund.


Valley Electronics AG – one of the leading companies in natural family planning since over 30 years

Valley Electronics has perfected its methods and algorithms in over 30 years to track a woman's menstrual cycle and predict when she is fertile and when not. Launched in 2014, Daysy is the latest invention from Valley Electronics; a device that combines years of experience, research, and advanced technology to provide modern women with a reliable and easy-to-use fertility tracker.

The Valley Electronics team of gynecologists, fertility experts, software engineers, and electronics engineers have worked together to analyze over 5 million menstrual cycles. Lady-Comp, the company's leading product in recent decades, has provided unparalleled depth of research and experience, which is now also being used in Daysy – an easy-to-use fertility tracker for the ambitious woman of today.

A personal statement from the inventor of Daysy

CEO-Natalie Rechberg-Egly Hello, my name is Natalie Rechberg, and I am the inventor of Daysy.

I grew up with natural family planning because my father developed the Lady-Comp, which has been successfully on the market for more than 30 years. But although I spent my whole life in this environment, I followed the trends of my friends and tried out various methods at a very young age. I quickly learned that this was not such a good idea for me and my body. My personal experience had taught me that natural menstrual cycle tracking was best for me, so I started using the Lady-Comp again.

From then on, I began to immerse myself intensively in the topic of “natural fertility management” and became an expert in this field. 

Today I am a cycle nerd! I created Daysy for women who are tired of hormonal contraception and who find the traditional NFP solution with pad and pencil too complicated and time-consuming. Daysy combines 30 years of experience and research with the latest technology to help women to understand their menstrual cycles better.

Get Daysy now and enjoy the liberties of natural family planning!

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