Daysy Fertility Tracker

Daysy Fertility Tracker

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Daysy Fertility Tracker
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  • Includes: Fertility tracker, battery, smartphone cable & instructions
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Daysy is an intelligent Fertility Tracker which tells you with 99,4% accuracy when you’re in your ovulation phase. Natural family planning is made easy thanks to Daysy’s clinically proven algorithms which have a Pearl index of 0.6. Take the guesswork out of family planning with your Daysy Fertility Tracker.


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    • Natural family planning with the Daysy Fertility Tracker
    • Takes the guesswork out of your ovulation
    • Calculates your fertility with an accuracy of 99,4%
    • Pearl index of 0.6
    • Takes between 30 and 60 seconds a day
    • Thermal sensor is accurate to within 1/100th of a degree
    • Use your Daysy together with the DaysyView app available for free on the Google Play Store and Apple App Store
    • Enjoy the advantages of a self-determined life without synthetic hormones
    • Daysy is a certified medical grade device (EN ISO 13485:2016)
    • 2 year warranty

Daysy is perfect for you:

  • If you don’t want to take synthetic hormones
  • If you want to experience your body in its natural state
  • If you’re suffering from a decrease in or loss of libido
  • If you’re currently breastfeeding
  • If you don’t want to let Fate decide something as important as having children
  • If you are in a committed relationship and no longer want to use a barrier method of contraception


  • Every morning before you get out of bed, pick up Daysy and press the activation button. The activation ring will light up quickly and your predicted fertility status will be displayed
  • Press the button once more and the lights of the activation ring will start rotating clockwise
  • Place the sensor tip under your tongue, as far back as possible and close your lips around the neck of Daysy
  • Wait until you hear 2 beeps * 
  • Daysy now shows today’s fertility status. To review your fertility status later in the day, simply press the activation button and your status will display
  • *If Daysy did not successfully capture your temperature you will hear a grumble buzz. If this happens, please try again.

Did you know? The Pearl index is a rating system used for contraceptives to rate the their efficacy. It is defined as the number of pregnancies per 1300 menstrual cycles. The lower the Pearl index rating the more effective the form of contraception.The Daysy boasts a score of just 0,6. To put this into perspective, “the pill” has a Pearl index of 9, and the male condom has a Pearl index of 18.

Disclaimer: Daysy is not a contraceptive but an accurate device that tracks fertility for you to manage your family planning.  Always consult with your medical practitioner for complete family-planning advice.


  • Includes: Fertility tracker Daysy (with battery), Connection cable for your smartphone & Instructions for use

Country of Origin:

  • Made in Germany
Overall Rating
5 out of 5 stars from 1 review

1 out of 1 people would recommend this product

08/08/2018, By Rose
If you are someone with a steady life routine and over taking hormones Daysy is the solution. For me it took about 3 months to get the device working optimal, and it has been a life changer to live without hormones. I would recommend being very careful in the red and orange days if you are using this method for anti-conception.

Please Note:

Faithful to Nature is an online retail store, specialising in a wide selection of natural supplements, vitamins, superfoods and health-related products. Our green team is all about helping you unlock your full potential to live a healthy life; however we are not medical professionals. Please do consult your health care practitioner when seeking medical advice. Some products may be manufactured in a factory that also produce gluten, nuts and dairy products.

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