Natural fertility awareness


Daysy enables women like you to deal more naturally with their fertility and menstural cycle. Daysy is a fertility tracker that uses the fertility awareness method by learning and tracking your menstrual cycle. Daysy tells you when you are in your fertile window and when not. During your fertile window you can choose to plan a pregnancy, during your infertile phase you can not. It's your choice.

Quick, reliable and proven: You can rely on Daysy’s algorithm

Unlike other methods, Daysy makes it easy to find out with certainty whether you are in your fertile or infertile phase. The simple and intuitive operation of Daysy lets you know the current status of your fertility within seconds. All you have to do is measure your basal body temperature under your tongue with Daysy in the morning immediately after waking up and before getting up. In addition, you enter whether you have your period. Based on your data and those from 5 million menstrual cycles and 30 years of research, Daysy's algorithm calculates within seconds whether you are fertile or not.

With these 3 colors you can keep track of your cycle and fertility

  • If Daysy shows you a green light, you are not fertile.
  • If Daysy shows you a red light, you are fertile.
  • Yellow days indicate cycle variations. They can also mean that Daysy is still in the learning phase.


At a glance: Why Daysy is ideal for fertility tracking

One of the advantages of Daysy is the ability to explore your own cycle and get to know your body better. Apart from the simple measurement of your basal body temperature in the morning and the input of your menstruation days, nothing else is necessary so that you can become aware of your cycle and body.

Find your own personal relationship with your body. Know your cycle, know yourself!

Daysy is a fertility tracker that uses the fertility awareness method by learning and tracking your menstrual cycle.