Select Page

Daysy Fertility Tracker


Daysy is a fertility monitor that uses the fertility awareness method by learning and tracking your cycle. It will show you if you are fertile or not with an accuracy of 99.3%. The Daysy is all natural, free of side effects and no charting is necessary.
Every morning when you wake up, you measure your temperature under your tongue. Enter if you have your menstruation then Daysy will evaluate your data and shows you if you are fertile or not.

We’ve worked out a special discount for our community:
For American & International Wonderful Within readers Get $15 Off at
For European wonderful within readers Get €10 off at


I have reviewed the Daysy fertility tracker on the blog ‘My Honest Experience Using Daysy as Birth Control’

Daisy claims to be 99.3% accurate with perfect use

Scientific Studies
The algorithm used in daysy is based on that used by the devices from Valley Electronics GmbH, which have been validated by over 28 years of use. The core fertility-tracking algorithm was extensively studied in 1997 in Germany. Over a period of more than 2 years, 686 users in Germany Switzerland, and Mexico were questioned about their experiences with the LadyComp and BabyComp devices. The study measured 10601 months and did register 39 unplanned pregnancies. Of those, 6 occurred during a “green” day leading to a method safety pearl-index of 0.7, and 33 occurred during a “red” or yellow “uncertain” day leading to a usage safety pearl-index of 3.8. For more information, please visit

Pin It on Pinterest