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 3 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 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 is German-made, Swiss-designed, with the foundation of over 3 decades of pioneering research, innovation, and experience from our family-run company.
  • Daysy calculates the infertile days with an accuracy of more than 99%. 
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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:
I wanted to share my experience now that I've used Daysy for a full month.

The post on Daysyusa's Instagram page saying "You don't ovulate on the same day every cycle" was spot on and I felt the need to share how much that resonated with my experience.

I have a very regular cycle. I track...
Anonymous
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
Compact, easy to use, easy to read, easy to track. Very handy and very accurate. Plus it's cute and the manual is pretty cool! :-)
Jay
Add to Cart — 299.00 EUR

incl. VAT and Shipping Product available - Delivery time: 2-3 days*

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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