Meet daysy – your personal fertility calculator.
Daysy lets you make the choice!
Daysy will show you if you are fertile or not with an accuracy of 99.3%. It is all natural and free of side effects.
As easy as 1,2,3...
Just 60 seconds once a day
- Every morning, take your temperature under your tongue.
- Confirm menstruation on the days you have it.
- Daysy evaluates your data and calculates your fertility status for the next 18 hours.
"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, student
"I would absolutely recommend it. I love daysy and how easy it is to use, plus the tracking makes it simple to show my doctor how things are going. My husband and I are both very concerned about the effects of hormonal birth control, but don't want to throw caution to the wind. Daysy makes it easy for us to monitor fertility together, without all the side effects of HBC."Lauren Halcik, HR Director
"I would absolutely recommend daysy. I am very conscious of what I put into my body, so when I started researching the pill I knew it wasn't the form of birth control I wanted to use, and I wanted to use a natural form of birth control and trust my body. I thought tracking my cycle would be complicated, but Daysy makes it so easy! Right now, I'm not planning for a baby but I know Daysy will be just as helpful in that stage of life as Daysy is right now."Brooke, Preschool teacher
"Daysy allows me to take control of my cycle without hormones or side effects. 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, high school math teacher:
You can rely on daysy.
The fertility monitoring algorithm in daysy has been developed with feedback from millions of cycles and uses advanced statistical methods to calculate your fertility status.
Daysy's program relies on the Lady-Comp algorithm, which has a proven track record of over 28 years.
The fertility computer is programmed to accurately determine and display the time of ovulation in the female body by taking your daily basal body temperature.
- Red = fertile
Red days are when to plan for a baby.
- Red blinking = ovulation day
- Green = infertile
Green days will not lead to pregnancy.
- Yellow = learning phase/cycle fluctuations
Daysy needs to learn more about you. If preventing pregnancy, treat as red days.
Daysy has an App.
Simply connect your daysy fertility calculator to daysyView to see all your cycle data.
Once daysy is connected to her app, she will automatically start syncing data with daysyView.
daysyView lets you see your temperature data and fertility prognosis.
Share your data with your loved one, and let them know when it’s the “right” day.
- See your daily, weekly and montly status of fertility
- See your color - coded monthly calendar
- Make notes
- See your cycle forecast
- See your temperature curve and values
- See your fertility and cycle statistics
- Share your data with your loved one through daysyView Partner App
- Enter sexual intercourse
- Get notified when something changes in your cycle
- Contact our expert team for advice and support
- Get free cycle analysis