Since its release in May 2014, thousands of women worldwide have used the Daysy fertility cycle calculator and the accompanying app, DaysyView to manage their family planning.


Similar to Ladycomp, Daysy is a fertility monitor presenting your daily fertility status based on the regular measurement of the basal body temperature (BBT) which is measured orally each morning. The device uses a statistical program to estimate the fertile and non-fertile days in your individual cycle.

Daysy is a fertility monitor that uses the fertility awareness method (FAM) by learning & tracking your menstrual cycle. With daysy, you can plan or prevent pregnancy just as you choose.

Daysy will show you if you are fertile or not with an accuracy of 99.3%. It is all natural, free of side effects and no charting is necessary.


The Benefits of Daysy

Choose Daysy and enjoy…

  • No side effects. Not now and not in future. Daysy is completely hormone free.
  • It’s super easy to use. Wake-up, measure, done!
  • No charting required. No more guessing.  Daysy does all the work for you.
  • Learn to trust your body and be in tune with who you really are.
  • Be in control of your body and your health.
  • Understand your cycle, understand your data, and understand yourself.
  • Highly accurate predictions allow you to plan your life better.
  • One time purchase to manage either baby planning or prevention.
  • Condom-free sex on non- fertile days

Daysy has a simple colour system for your fertility status, and is a standalone device, meaning you don’t need DaysyView to tell you when you are fertile or not.  DaysyView partners with Daysy to provide complete fertility management. Daysy is unique, in that it is a certified medical device developed with the highest quality and safety standards under the strict European certification system.


DaysyView allows you to view your all your cycle statistics:

  • Monthly Fertility Calendar
  • Temperature Graph
  • Number of stored cycles
  • Average Length of cycle
  • Average ovulation day
  • Ovulation day fluctuation
  • Average Length of High days
  • Number of missed measurements


Daysy will help you to…

  • bring spontaneity to your love life
  • take control of your health
  • begin to know and trust in your body’s natural rhythms
  • eliminate the use of harmful, hormone-based birth control methods
  • restore your body to optimal health
  • prevent unwanted pregnancies with an accuracy rate of 99.3%
  • plan for a baby when the time is right for you

A personal note from the creator of Daysy


Hi, I’m Natalie Rechberg, founder of Daysy.

I grew up immersed in natural fertility management because my father was the founder of Lady-Comp, a leading tool in natural family planning for over 30 years.  Even though I spent my entire life in this environment,  I followed the trends my friends followed and tried different birth control methods at an early age. I learned fast that, for my body, this wasn’t such a good idea. Like so many women, I suffered side-effects from hormone-based birth control options, including significant weight gain and cellulite. My experience taught me that natural birth control was right for me, so I went back to using the Lady-Comp.

From this time forward, I immersed myself in natural fertility management and have become a sought-after expert in woman’s natural menstrual cycles. I also trained as a yoga instructor and deepened my studies in health and wellness for women.

Today, I am a menstrual cycle geek!  I created Daysy for those women who are sick and tired of hormonal birth control but find traditional natural methods too complicated for their busy lives. Daysy leverages 30 years of experience and research along with the latests technologies to help women safely and confidently manage their fertility for both planning and preventing pregnancy.

Get Daysy and enjoy the modern freedoms of natural birth control!