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:
Investing in my Daysy is one of the best decisions I've ever made. My health and life changing effects aside, the customer service at Daysy is the best I've ever received. Each time I've ever had a question and emailed them they get back to me right away and are so clear with their answers. They ...
Jess
Daysy is so easy to use and What you get out of it is this wealth of information about your body. I now know the rhythms and the Health of my body, no guessing. I love Daysy and have told all my friends about it.
Mari, Teacher
It is a useful tool that has helped my husband and I grow together with learning about my cycle, and I would highly recommend it as a better way to approach family planning, and is easy to use.
Leda Wolk private chef
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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