About Daysy

As a medical device and lifestyle fertility tracker, Daysy allows women with the desire for a health-conscious lifestyle to monitor their individual menstrual cycle and determine their fertile and infertile phases in natural harmony with their body. Daysy is a reliable and scientifically supported method allowing women to accurately differentiate their fertile phases from infertile phases based on a sensitive basal body temperature measurement. Through an intelligent algorithm based on scientific studies and knowledge, years of experience, and sophisticated technology, Daysy offers the highest quality, reliability, and precision for fertility tracking. As a direct result, Daysy is trusted and recommended by its users. Daysy was developed as a medical device, is registered accordingly, and is continuously monitored by a certified quality management system. Daysy is to be used to facilitate conception and track the menstrual cycle. Daysy is not a replacement for contraception.

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Company description

Valley Electronics is an innovative, reliable and woman-led family company. With competence and experience in the field of fertility tracking, it is committed to reliable and science-based natural fertility management. Since 1986, Valley Electronics has been a pioneer in the field of “fertility tracking” and has since expanded its experience and research in monitoring the female cycle and combined it with the possibilities of technological progress. High product reliability and user satisfaction have always been the driving forces. The company can therefore look back on a unique long-term and positive experience in a market that has only recently become very dynamic.

Natalie Rechberg-Egly

Natalie Rechberg-Egly is FemTech Entrepreneur, Founder of Daysy, and CEO of Valley Electronics AG.



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Malin Graumann


Daysy Links


Instagram: @daysyfertilitytracker

Facebook: /daysyfertilitytrackermethod/