Daysy
Your personal fertility tracker

Daysy - your personal fertility tracker

Daysy is the hormone-free solution for managing your fertility, cycles, and health. Daysy calculates when you are fertile and when you are not. On your fertile days, it is possible for you to conceive; outside of your fertile window, it is not. Daysy supports you in empowered and informed decision-making.

Daysy displays your fertility status as a simple red (you are fertile / possibly fertile) or green (you are not fertile) light.

Daysy is German-made, Swiss-designed, with the foundation of over three decades of pioneering research, innovation, and experience from our family-run company.

Daysy calculates the infertile days with an accuracy of more than 99%.

Daysy requires no subscription, the app is free. Daysy is FSA eligible. Daysy has flexible payment options.

 

Daysy is the hormone-free solution for managing your fertility, cycles, and health. Daysy calculates when you are fertile and when you are not. Daysy supports you in empowered and informed decision-making.

Daysy is German-made, Swiss-designed, with the foundation of over three decades of pioneering research, innovation, and experience from our family-run company.

Daysy calculates the infertile days with an accuracy of more than 99%.

Daysy requires no subscription, the app is free. Daysy is FSA eligible. Daysy has flexible payment options.

 

As easy as 1, 2, 3 ...
Only about 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 and shows you if you are fertile or not.
What our customers say:
Daysy allows me to take control of my cycle. I can use Daysy and not have to worry about making errors the way I would with the calendar or mucus method alone. I can be confident that I am understanding my body well and being responsible with my future!
Anonymous
I highly recommend Daysy, it has to be one of the best investments. If something goes wrong customer service is there to help you and Daysy is easy to use. Also in the long run it'll save you money since you'll know your fertility.
Liliana
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
You can count on Daysy!
  • Red = fertile / possibly fertile
    On red days you can plan for a pregnancy.
  • Red flashing = predicted day of ovulation
  • Green = infertile days
    You are not fertile on green days.
  • Yellow = learning phase/cycle fluctuation
    On yellow days, Daysy becomes better acquainted with you.
  • Red, green, yellow = possible pregnancy

We are proud to have won one of the most renowned international design awards - the Red Dot Design Award 2019. The coveted seal of quality for exceptional design is awarded only to products that impress with their outstanding appearance and concept. The Red Dot Award, with over 18.000 submissions, is one of the largest design competitions in the world.

Keep track with the Daysy app
Discover DaysyDay!
Statistics & forecasts

Look at your predicted menstrual cycle calendar, temperature curve and menstrual cycle statistics.

Take notes

Track cervical mucus, intercourse, and your own notes about your cycle.

Contact our expert team

Easily reach out to our expert team if you need advice and support.

Medical basics related to the female cycle
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