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Meet Daysy – your personal fertility calculator.

Daysy lets you make the choice!

Daysy is a fertility tracker that uses the fertility awareness method by learning and tracking your menstrual cycle. Daysy shows you the days you are fertile or not. This way, you can plan a pregnancy or use a hormone-free, barrier method to prevent a pregnancy, you choose.

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 30 seconds once a day

  1. Every morning, take your temperature under your tongue.
  2. Confirm menstruation on the days you have it.
  3. Daysy evaluates your data and calculates your fertility status for the next 24 hours.

"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 my BBT and CF daily and know that I ovulate on Day 14 like clockwork... except this month I was traveling and experiencing a bit more stress than usual. This is our first month TTC and when Daysy indicated I ovulated on Day 16 rather than 14, we acted accordingly.... just found out I am pregnant today!

Daysy is a revolutionary product and I have been telling my patients, colleagues, friends, and family all about it! Very impressed!"

Anonymous until Announcement

"I have already recommended the product and two of my friends have bought Daysy! I love it! I personally dislike birth control pills. They make me.... well, not me. Other birth control methods I have heard first hand horror stories. That one story of each product makes it not worth the risk to me. This is extremely easy to do and extremely easy to remember to do. I use my cell phone as my alarm to wake up, and I keep Daysy on my night stand right next to my phone. I have been using it for the past 7 months and I love it!"

-anonymous

"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:

"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
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EUR 290.00

incl. VAT plus Shipping
Product available - Delivery time: 3-5 days*

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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. The Lady-Comp, is the most popular fertility monitor internationally.

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.
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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.

Meet daysyView.

  • 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

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*Applies to deliveries to Germany. Delivery times to other European countries are extended by an additional maximum of 10 days. Countries outside Europe are not supplied. The deadline for the delivery begins with payment in advance on the day after the payment order has been issued to the transferring credit institution or in the case of other forms of payment the day after the contract is concluded and ends with the expiration of the last day of the deadline. If the last day of the deadline falls on a Sunday or a public holiday recognized by the State as a delivery place, the next working day shall be replaced by such day.

Accepted payment methods: Credit card, PayPal, advance payment