- All it takes is just a drop of saliva
Effective date: October 27, 2026
Hilin Life Products, Inc., doing business as KNOWHEN® (“KNOWHEN,” “we,” “us,” or “our”), respects your privacy. This Privacy Policy explains how we collect, use, disclose, retain, and protect personal information when you visit https://knowhen.com, make a purchase, contact us, submit a review, or otherwise interact with our website and online services (collectively, the “Site”).
This Policy applies to the Site. The KNOWHEN®LITE mobile application, app stores, social-media platforms, retailers, and other third-party services may have their own privacy notices and terms.
We collect personal information to operate the Site, process orders, provide customer support, prevent fraud, improve the Site, measure advertising performance, and communicate with you. The categories of personal information we may collect include identifiers and contact details, commercial information, device and online activity information, payment and transaction information, customer-service communications, and information you voluntarily submit in a review or contact form.
We use Google tags and Meta Pixel technology on the Site to measure traffic, advertising performance, and conversions. These technologies may collect device identifiers, IP address, browser information, pages viewed, and interactions with the Site. Depending on applicable law and the configuration of these technologies, this activity may be considered a disclosure, sale, or sharing of personal information for cross-context behavioral advertising. See Section 7, Your Privacy Choices, for how to exercise your choices.
Please do not submit sensitive health information, medical records, or other sensitive personal information through a public review or a general website contact form. If you choose to provide health-related or fertility-related information when contacting us, we will use it only as reasonably necessary to address your request, provide support, protect the Site, or meet legal obligations.
We may collect the information you provide when you place an order, create or use an account if that option is available, join a mailing list, submit a contact form, ask for customer support, leave a review, participate in a promotion, or otherwise communicate with us. This may include your name, email address, phone number, shipping address, billing address, order details, and the contents of your message or review.
When you make a purchase, we collect or receive information about the order, products purchased, amount charged, payment status, shipping and fulfillment, returns, refunds, warranty requests, and related communications. Payment-card information is processed through the payment provider available at checkout. We do not store full payment-card numbers on our own systems.
When you use the Site, we and our service providers may automatically collect your IP address, browser type, operating system, device information, referring pages, pages viewed, links clicked, approximate location derived from IP address, dates and times of access, cookie identifiers, advertising identifiers, and information about how you interact with the Site.
The Site uses cookies and similar technologies, including WooCommerce cookies that support shopping-cart and checkout functions, Google tags used for site measurement and advertising performance, and Meta Pixel technology used for advertising measurement. These technologies may recognize a browser or device over time and across online services.
We may receive information from payment processors, shipping and fulfillment providers, website and security providers, advertising and analytics providers, social-media platforms, and other service providers that help us operate the Site and provide products and support.
We use personal information to:
We do not use health-related details you voluntarily provide in a general support request to make decisions about you or to send targeted advertising based on those details.
We may disclose personal information to the following categories of recipients:
We do not sell personal information for money. Our use of advertising and analytics technologies may constitute a “sale” or “sharing” of online identifiers and internet activity under some U.S. state privacy laws. You may opt out as described below.
Cookies are small files stored by your browser. Some cookies are necessary for the Site to function, including shopping-cart and checkout cookies. Other cookies support site measurement, advertising, and fraud prevention.
You can manage cookies through your browser settings. You may also use the opt-out tools offered by Google and Meta through their privacy controls. Blocking certain cookies may affect shopping-cart, checkout, or other Site features.
We retain personal information for as long as reasonably necessary to provide the Site and our products, complete transactions, provide support, comply with legal, tax, accounting, warranty, and recordkeeping obligations, resolve disputes, enforce agreements, and protect against fraud and misuse.
We use reasonable administrative, technical, and physical safeguards designed to protect personal information. No method of electronic transmission or storage is completely secure, and we cannot guarantee absolute security.
You can opt out of promotional emails by using the unsubscribe link in the message. Opting out of marketing communications does not stop transactional messages, such as order confirmations, shipping updates, customer-service replies, or important policy notices.
To opt out of the use of your online activity for targeted advertising by KNOWHEN, email [email protected] with the subject line “Privacy Choice: Opt Out of Targeted Advertising.” Include the email address you use with us and, if possible, the browser or device you use to access the Site. You may also use browser controls, advertising-platform controls, and a browser-based opt-out preference signal, such as Global Privacy Control, where supported.
Depending on where you live and subject to applicable law, you may have the right to request access to, correction of, deletion of, or a portable copy of certain personal information. You may also have the right to opt out of certain processing, including a sale or sharing of personal information, targeted advertising, or certain profiling.
To submit a privacy request, email [email protected] with the subject line “Privacy Request.” Please state the nature of your request and provide enough information for us to reasonably verify your identity. We will not discriminate against you for exercising an applicable privacy right.
If we deny your request, you may appeal by replying to our decision email with the subject line “Privacy Appeal.” If you are dissatisfied with our response to an appeal, you may have the right to contact your state attorney general or other privacy regulator.
Authorized agents may submit a request when permitted by law. We may request information necessary to verify the agent’s authority and your identity.
California residents may have the right to know, correct, delete, or receive information about personal information; to opt out of sale or sharing; and to limit certain uses and disclosures of sensitive personal information. The Site does not use sensitive personal information to infer characteristics about you. The Site may share online identifiers and internet activity with advertising and analytics providers as described in this Policy. To exercise a California privacy right, use the request methods in this Section.
We do not knowingly sell or share the personal information of consumers under 16 years of age.
Residents of states with applicable comprehensive privacy laws, including New Jersey, may have similar rights. To the extent applicable, we process privacy requests in accordance with those laws.
The Site relates to fertility awareness and ovulation products. Information about visits to a fertility-related website, product purchases, or messages that describe fertility or health concerns may be sensitive.
We do not ask you to provide health information through public reviews or general contact forms. If you voluntarily provide fertility or health-related information to customer support, we use it only to respond to and manage your request, protect the Site, or comply with law. The Site is not a healthcare-provider portal, and information provided through the Site is not intended to create a patient-provider relationship or to serve as a substitute for professional medical care.
The Site is not directed to children under 13, and we do not knowingly collect personal information from children under 13. If you believe that a child has provided personal information to us, please contact us at [email protected] so we can take appropriate action.
The Site is operated from the United States. If you access it from another country, your personal information may be transferred to, stored in, and processed in the United States and other locations where our service providers operate. Those locations may have privacy laws that differ from the laws of your country.
The Site may link to third-party websites, app stores, retailers, social-media platforms, or other services. Their privacy practices are governed by their own policies. We are not responsible for the privacy practices of third parties.
We may update this Privacy Policy from time to time. We will post the updated version on this page and revise the effective date. Your continued use of the Site after the updated Policy takes effect is subject to the revised Policy, to the extent permitted by law.
For questions, privacy requests, or concerns, contact:
Hilin Life Products, Inc. d/b/a KNOWHEN®
One Gateway Center, Suite 2600
Newark, New Jersey 07102
United States
Email: [email protected]
Telephone: 1-877-4KNOWHEN (1-877-456-6943)
The KNOWHEN® Ovulation Test tracks your ovulation using only a drop of your saliva. It identifies your five (5) most fertile days and the best days in your ovulation cycle if you’re trying to conceive.
