Daysy
Your personal fertility tracker

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

As easy as 1, 2, 3..
Only 30-60 seconds per day!
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 shows you if you are fertile or not.
What our customers say:
I would say that Daysy is one of the most fantastic purchases I have ever made! It has taught me to listen to my body and its natural cycle rather than changing it with unnatural methods. I would most definitely recommend this product to my best friend, in fact, I have!
Natalie
Highly recommend Daysy because it is hormone-free, easy to use, and is backed up by awesome customer service.
Lisa, student
I would definitely recommend this wonderful, easy and hormone-free 'tool' to anyone who would listen! (And I have :-D)
Teska Meulenberg - consular officer
You can count on Daysy!
  • Red = fertile
    On red days, you can plan for a baby.
  • Red flashing = day of ovulation
  • Green = out of your fertile window
    You are not fertile on green days.
  • Yellow = learning phase/cycle variations
    On yellow days, Daysy becomes better acquainted with you. If pregnancy is out of the question for you right now, consider these days as red and use a barrier method of your choice or postpone PIV (penis-in-vagina) sex.
Medical basics related to the female cycle
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