• Introducing
    your friend, Eva

    Eva lets you KNOWHEN®

    The KNOWHEN® Saliva Fertility Kit and APP have been uniquely designed to allow women to easily and accurately find out when they are ovulating.

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  • Family

    Keeping it simple and natural.

    With Lab Quality Patented Lens and FDA-cleared, KNOWHEN® is a product that is revolutionizing the world of women’s health by giving women the power to understand and control their fertility cycles.

  • Dear

    A Word from Helen, CEO & Founder

    "My promise to you is that KNOWHEN® will change your life and unlock the secret of your unique fertility cycle... "

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  • Every woman
    should know

    When is the best time to have sex

    Whether your goal is to start a family, or to prevent pregnancy, we can help. The KNOWHEN® Saliva Fertility Monitor is the only US Clinically tested, and FDA cleared product to let you know when to conceive.

  • Is today
    the Day?

    Do you know if you can conceive?

    Most women don't know the unique variations in their monthly reproductive cycles, but now you can. KNOWHEN® helps you know more about your fertility with accuracy, convenience, and efficiency.

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The Natural Solution to Family Planning

Would you like to know whether you can conceive and when would be the best time to do that? Thanks to the development of a simple, easy-to-use device, now you can. Let KNOWHEN® help you predict your fertility cycles accurately, efficiently, and naturally.

Who Benefits from Using KNOWHEN®?

You benefit from using the KNOWHEN® if you:

  • are looking for new style of life
  • want to take control over personal fertility
  • prefer a natural way to monitor the regular menstrual cycle
  • have irregular menstrual cycles
  • want to increase your chances of conceiving
  • you are a couple who want to enjoy their sex life naturally without fear of conception
  • are premenopausal women who don't want a surprise pregnancy
  • prefer "Freedom of Choices and Peace of Mind" when it comes to family planning

Learn More

Blog Articles

Fate after an Ovulation monitor

The choices we make in our live are often less a product of our singular desires...

Foods for Better Sex

What to eat to amp up your sex drive.

Male Fertlity Gene

Scientists have found a gene that can also have ties to male fertility.

Unlock your Secret Fertility Code

Ovulation could occur as often as twice a month, and as little as every 10 months.

Fertility Issues in Uganda

At 6.1 births per woman, Uganda currently has the 6th highest birth rate in the world.

Personality Affecting Fertility

Mindset and outlook are crucial to conceiving.


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In The Media

Helen Denise, Chief Executive Officer of HiLin Life Products based in Newark, New Jersey took home the coveted Sharkette Tank Winner Award at the second annual Own It Ventures Conference& Pitch Expo, held at the CUNY Graduate Center in New York City on March 20, 2013. Hilin Life Products was announced the winner after five companies entered the afternoon Sharkette Tank in front of a panel of investors from New York and New Jersey. In addition, the audience selected Ms. Denise for the Women's Choice Award for the best overall investor pitch.
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