Our Story and Who We Are

WHY WE’RE HERE

Fertility hardware pioneers since the 1980’s

Dr. Hubertus Rechberg founded Valley Electronics after seeing his wife struggle with the side effects of the pill for years.

Concerned about her health, he searched for a natural alternative, but the available solutions were complex, time-consuming, and involved manual charting with pen and paper.

So he teamed up with gynecologists, software specialists, electrical engineers, and designers to digitize natural family planning. In 1986, we released the world’s first ovulation tracker. And made fertility tracking the new, effortless normal.

I am absolutely convinced by Daysy! It is very easy to use, you can hardly do anything wrong. The support is excellent, and the price is justified. Initially, I wasn’t sure if it would be reliable with shift work and short sleep phases... but it has been no problem for Daysy.

Miriam

When I was diagnosed with PCOS, I often felt powerless and uncertain about my fertility. But since I started using this device, I have learned to understand my body better and manage my fertility naturally. It shows me cycle fluctuations, and I can act accordingly. It has helped stabilize my menstrual cycle and restore my confidence in my fertility.

Beatrice

4 decades of non-stop development

Where body intelligence meets female-focused innovation

Through the years, we’ve tirelessly researched and improved our ovulation trackers
to create trustworthy, non-invasive med-tech that genuinely serves the
needs of women, teens, and people with periods worldwide.

For 4 decades, we’ve researched, developed and constantly improved our devices
to adapt to the needs of all women, teens and people with periods.

Explore our Trackers

SUPPORTED BY YEARS OF RESEARCH

Because for fertility, accuracy is everything

Unlike other basal body thermometers, our medically tested devices combine a sophisticated sensor with a science-backed algorithm developed over 35+ years. Capable of detecting temperature change from hormonal fluctuations to the hundredth of a degree.

Across 16 clinical studies and analysis of over 10 million cycles, our unique algorithm is proven to pinpoint fertile and non-fertile days with 99.4% accuracy.

So you get cycle predictions you can trust with your future plans – whatever they may be.

Take a look at the study

CEO Valley Electronics

Natalie Rechberg

When women have insight into the natural, inner workings of their bodies, that’s where the magic happens.

My life’s purpose is to support women by giving them access to an easy, reliable, and accurate way to track their cycles, so they can make timely health decisions that are right for them.

HELPING WOMEN TUNE IN

BACKED BY MEDICAL EXPERTS

Whether developing new period trackers or improving existing devices, answering questions or writing blog posts, we always work closely with medical experts.

Bárbara Yu Belo
Certified Natural Fertility Instructor, Women’s Hormone Health Coach

Dr. Niels van de Roemer
Medical Advisor

Anne Grass
Nutritionist with a focus on nutritional medicine

Dr. med. Martin Koch
Obstetrician-Gynecologist and Scientific Advisor

Petra Schenke
Certified Natural Family Planning Consultant and Cycle Expert

Vanessa Martin
Certified Menstrual Cycle Coach | Degree in Holistic Women's Health