Understanding how we collect, use, and protect information when you visit our website and use our online scientific calculator tool.
Effective Date: January 1, 2026
Last Updated: January 1, 2026
Welcome to XinYuMaTou (hereinafter referred to as "we", "us", or "our"). We are committed to protecting the privacy of all visitors to our website and users of our services. This Privacy Policy explains what information we collect when you visit our website and use our online scientific calculator, how we use that information, the choices you have regarding your data, and the measures we take to protect your privacy. Our scientific calculator is designed to serve students, engineers, scientists, teachers, and professionals who require fast, accurate, and accessible mathematical computation.
Please read this Privacy Policy carefully. By accessing or using our website and services, you acknowledge that you have read, understood, and agree to be bound by the terms set forth in this policy. If you do not agree with any part of this policy, please discontinue your use of our website and services immediately. This policy applies to all pages and tools within our website, including our scientific calculator, any related educational content, and informational pages.
Our scientific calculator is built with a privacy-first philosophy. The core calculation functionality is designed to operate within your web browser without requiring your calculations to be transmitted to our servers. This means that the mathematical expressions you enter and the results you obtain typically remain on your device unless you choose to share them. We believe that your privacy is important, and we have structured our services to respect that principle at every level.
Important Note About Third-Party Services: While we operate our calculator with a privacy-first approach, our website uses third-party services including Google AdSense for advertising and Google Analytics for traffic analysis. These services may collect information independently, as described in detail later in this policy. We encourage you to review the privacy policies of these third-party providers to understand their practices.
When you visit our website and use our scientific calculator, we may collect information in the following ways:
We do not require you to provide personal information to use our scientific calculator. However, you may choose to provide personal information when you contact us through email or other communication channels. This information may include:
We only use this information to respond to your inquiries and to maintain our relationship with you as a user of our services. We do not sell or share this personal contact information with third parties for marketing purposes. We may retain correspondence for a reasonable period to maintain a record of the communication and for quality assurance purposes.
When you visit our website, our servers and third-party services operating on our website may automatically record certain standard information transmitted by your web browser. This information is common to most website visits and does not typically identify individual users personally. The information may include:
This automatically collected information is used primarily for website administration, troubleshooting, analytics, ensuring the quality of our services, and optimizing the user experience. We may also use this information to understand broad demographic trends among our visitors (for example, what percentage of our visitors use mobile devices versus desktop computers, or the geographic distribution of our visitors at a country level).
We use cookies and similar tracking technologies to enhance your browsing experience, to understand how our website is used, and to support third-party advertising and analytics services. Cookies are small text files that are placed on your device when you visit a website. They enable the website to remember your actions and preferences over time. Similar technologies include web beacons (also known as pixel tags or clear GIFs), local storage (HTML5 storage), and embedded scripts.
The cookies and similar technologies used on our website fall into the following categories:
These cookies are necessary for the basic functionality of our website. Without them, certain features of the site may not work properly. They are typically set only in response to actions you take, such as setting your privacy preferences or logging into restricted areas. These cookies do not store any personally identifiable information.
These cookies help us understand how visitors interact with our website by collecting and reporting information anonymously. We use these cookies to count visits and traffic sources, to measure and improve the performance of our site, and to understand which pages are the most and least popular and how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. We use Google Analytics for this purpose. Google Analytics uses cookies to collect information about how visitors use our website. The information generated by the cookie about your use of our website (including your IP address) will be transmitted to and stored by Google on servers in the United States. Google will use this information for the purpose of evaluating your use of our website, compiling reports on website activity, and providing other services relating to website activity and internet usage.
These cookies are used to deliver advertisements that are more relevant to you and your interests. They are typically placed by advertising networks with our permission. These cookies may be used by those companies to build a profile of your interests and show you relevant advertisements on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. We use Google AdSense to serve advertisements on our website. Google AdSense uses cookies to serve ads based on a user's prior visits to our website or other websites.
These cookies allow our website to remember choices you make, such as your language preference or other settings, to provide a more personalized experience. They may also be used to provide enhanced functionality such as remembering calculator settings or preferences.
You can control and manage cookies through your browser settings. Most modern web browsers allow you to block or delete cookies, and you can typically set your browser to notify you when a website attempts to place a cookie on your device. Please note that blocking cookies may affect your ability to use certain features of our website. For more information about cookies and how to manage them, you may wish to visit educational resources provided by independent technology organizations or the help documentation for your specific browser.
We also use local storage (a technology similar to cookies but allowing for larger amounts of data storage) to remember your cookie preferences and certain calculator settings. This data stays on your device and is not transmitted to our servers unless you explicitly take action to share it.
We use the information we collect for the following purposes:
We want to be clear about our practices. We do NOT:
This section provides additional detail about the cookies and tracking technologies used on our website and your choices regarding these technologies.
Cookies are small text files containing small amounts of information which are downloaded to your device when you visit a website. Cookies are then sent back to the originating website on each subsequent visit, or to another website that recognizes that cookie. Cookies are useful because they allow a website to recognize a user's device or browser. Cookies do lots of different jobs, like letting you navigate between pages efficiently, remembering your preferences, and generally improving the user experience. Cookies may be set by the website you are visiting (first-party cookies) or by other websites that run content or advertising on the page you are visiting (third-party cookies).
The following table describes the categories of cookies used on our website and provides information about their purpose and duration:
You have several options for controlling cookies and similar technologies on our website:
Some web browsers may transmit "Do Not Track" signals to the websites you visit. There is no industry standard or legal requirement governing how websites should respond to these signals. At this time, our website does not specifically respond to Do Not Track signals from browsers. However, you can control cookies and tracking technologies through the methods described in this section.
In addition to cookies, we may use HTML5 local storage and similar technologies to store information on your device. These technologies allow us to store larger amounts of data than cookies and can be used to remember your preferences across sessions. You can typically manage local storage through your browser settings or by clearing browsing data.
Our website uses third-party services to support operations, deliver content and advertising, and analyze usage. This section describes the third-party services we use and how they may collect and use information.
We use Google AdSense, a service provided by Google LLC, to display advertisements on our website. Google AdSense helps us generate revenue to support the continued operation and development of our free scientific calculator. When you visit our website with Google AdSense enabled, the following may occur:
You can opt out of personalized advertising by visiting Google's Ads Settings page. Alternatively, you can opt out of third-party vendors' use of cookies for personalized advertising by visiting the Network Advertising Initiative opt-out page or the Digital Advertising Alliance opt-out page, or by using other opt-out mechanisms as described in the previous section of this policy.
For more information about how Google uses information from sites or apps that use Google services, we recommend that you review Google's Privacy Policy and the Google AdSense program policies. These documents provide detailed information about Google's data collection and usage practices.
We use Google Analytics, a web analytics service provided by Google LLC, to help us understand how visitors engage with our website and scientific calculator. Google Analytics uses cookies and similar technologies to collect information about website usage and to report statistical information to us. The information collected by Google Analytics includes:
We use this information to improve our website, to optimize our scientific calculator for different user groups, and to understand which features and content are most valuable. Google Analytics stores this information on servers in the United States and processes it according to Google's privacy policy. As noted in the previous section, you can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.
We use Google Fonts, a service provided by Google LLC, to deliver typography to our website. When you visit our website, your browser may connect to Google's servers to download font files. This connection may transmit standard information including your IP address and browser information. We use Google Fonts to ensure consistent, high-quality typography across different devices and browsers. For more information, please review the Google Fonts privacy documentation.
We may use third-party hosting providers and content delivery networks (CDNs) to deliver our website content efficiently to users around the world. These services may collect standard log file information including IP addresses, browser information, pages visited, and timestamps to enable the delivery of content and to ensure the security and reliability of their services.
From time to time, we may integrate additional third-party services into our website to enhance functionality or support operations. These may include services for content management, performance monitoring, security, and other operational purposes. Each third-party service operates according to its own privacy policy and practices. We encourage you to review the privacy policies of these service providers for more information about their data collection and usage practices.
Our website may contain links to third-party websites or resources, including links from advertisements served through Google AdSense and other advertising networks. We have no control over these external websites and assume no liability for their content, privacy policies, or operational practices. The inclusion of any third-party link on our website does not constitute an endorsement by us of that website or its practices. When you click on a third-party link or advertisement, you will be directed to that third party's website. We strongly advise you to review the privacy policy of every website you visit. We are not responsible for the privacy practices or the content of such third-party sites.
We take the security of information seriously and implement reasonable technical and organizational measures to protect data. Our scientific calculator is designed to perform calculations within your browser without requiring your mathematical expressions to be submitted to our servers for processing. This means that your calculator inputs and results typically do not leave your device unless you voluntarily share them or unless third-party services operating on our website collect standard browser information as described elsewhere in this policy.
Our website is served over secure HTTPS connections, which encrypts data transmitted between your browser and our servers. Standard security measures we employ include:
While we take these precautions, please note that no method of transmission over the Internet or method of electronic storage is 100% secure. We cannot guarantee absolute security of information, and any transmission of information to our website is done at your own risk. If you have concerns about data security, we recommend that you review your browser settings and consider whether to enable or disable specific features such as cookies or JavaScript for our website.
Our services are available globally. The information we collect, and the information collected by third-party services operating on our website, may be stored and processed in any country where our personnel or service providers maintain facilities. By using our services, you consent to the transfer of information to countries outside your country of residence, whose data protection laws may differ from those in your home jurisdiction. For example, Google, which provides our advertising and analytics services, stores and processes information in the United States and other countries according to Google's data processing terms and applicable laws. We take steps to ensure that data is processed securely and in accordance with this Privacy Policy regardless of where it is stored or processed. Where we engage third-party service providers for processing of personal information, we seek to ensure that appropriate safeguards are in place to protect your information in accordance with applicable legal requirements.
We retain information only for as long as necessary to fulfill the purposes outlined in this Privacy Policy, unless a longer retention period is required or permitted by law. The specific retention period depends on the type of information and the purpose for which it was collected. Automatically collected log file information may be retained for a limited period for security and administration purposes before being aggregated or deleted. Personal correspondence (such as email) may be retained for a reasonable period to maintain a record of the communication. Cookies set on your device remain until they expire or until you delete them through your browser settings. Third-party services operating on our website retain information according to their own data retention policies, which you can review by visiting their respective privacy policies.
Depending on your location, you may hold certain rights regarding your personal data under applicable data protection laws. These rights may include the following:
If you are a resident of the European Economic Area (EEA), you have the right under the General Data Protection Regulation (GDPR) to:
If you are a resident of California, you have the right under the California Consumer Privacy Act (CCPA), as amended by the California Privacy Rights Act (CPRA), to:
To exercise any of the above rights or to ask questions about your privacy rights, please contact us via email at the contact information provided at the end of this policy. We will respond to legitimate requests within a reasonable timeframe and in accordance with applicable legal requirements. We may need to verify your identity before responding to certain requests, particularly those involving access to or deletion of personal information. This verification may require you to provide additional information to confirm that you are the individual to whom the information relates.
As mentioned earlier in this policy, you can manage cookies through your browser settings and through the opt-out mechanisms provided by third-party advertising networks. Most browsers offer instructions on how to manage cookies in their "Help," "Settings," or "Preferences" sections. You can also opt out of personalized advertising from Google and from many other advertising networks by visiting the opt-out pages referenced earlier in this policy.
If you have questions about the data practices of third-party services operating on our website (such as Google AdSense, Google Analytics, or Google Fonts), we recommend contacting those providers directly or reviewing their privacy policies for information about their data collection and usage practices and for information about how to exercise your rights directly with them.
Our services are not specifically directed at children under the age of 13, or children under the age of 16 within the European Economic Area. Our scientific calculator is a general-purpose mathematical tool intended for use by students, educators, engineers, scientists, and professionals of all ages, but we do not target our services specifically to children and we do not knowingly collect personal information from children.
Our website uses third-party services including Google AdSense for advertising. Google AdSense and its partner advertising networks may deliver advertisements to visitors of our website. While we do not target children, and while we operate our website with general-audience content, we note that third-party advertising services may operate their own content and age-appropriateness policies. We recommend that parents and legal guardians supervise their children's online activity to ensure appropriate usage.
If we discover that we have collected personal information from a child without verifiable parental consent, we will take steps to delete such information as soon as possible. If you believe that we might have any information from or about a child, please contact us using the contact information provided at the end of this policy and we will make reasonable efforts to promptly investigate and address your concern.
Third-party services operating on our website may have their own children's privacy practices and policies. For more information about how Google handles information from users of different ages, we recommend reviewing Google's privacy policy and the Google for Families resources.
Notice for Parents and Guardians: If you are a parent or guardian and you believe that your child has provided us with personal information, please contact us. We are committed to protecting children's privacy and will promptly respond to legitimate inquiries.
We may update this Privacy Policy from time to time to reflect changes to our practices or to comply with legal and regulatory requirements. The "Effective Date" and "Last Updated" date at the top of this policy indicate when this policy was most recently revised. Any changes to this policy become effective immediately upon posting the updated policy on this page. We encourage you to review this Privacy Policy periodically to stay informed about our privacy practices.
Material changes to this policy will be indicated by a notice on our website or by other reasonable means. In cases where changes are significant or materially affect your rights, we may provide additional notice such as a prominent banner on our website or direct communication. Your continued use of our website and services after any changes to this policy constitutes your acceptance of the revised policy.
Previous versions of this Privacy Policy are available by contacting us. We maintain a record of all substantive changes to our privacy practices for a reasonable period. If you have questions about how our privacy practices have changed over time, please contact us using the contact information provided below.
We may update this Privacy Policy in response to circumstances including but not limited to:
If you have any questions, concerns, or requests regarding this Privacy Policy, our privacy practices, or the use of your information, please contact us. We take privacy matters seriously and will respond to all legitimate inquiries within a reasonable timeframe. You can reach us through the following contact method:
When contacting us about privacy matters, please provide as much detail as possible about your question or concern. This will help us respond more effectively to your inquiry. We may need to verify your identity before responding to certain requests, particularly those involving access to or deletion of personal information.
You may also wish to review Google's privacy resources for information about Google's data practices with respect to advertising and analytics services. Google provides opt-out tools and detailed documentation about their use of cookies and similar technologies.
Thank you for taking the time to read our Privacy Policy and for trusting us with your use of our scientific calculator. We are committed to maintaining the privacy and trust of our users and to providing a valuable, free mathematical tool to students, engineers, scientists, and professionals worldwide.
Summary: Our scientific calculator operates with a privacy-first approach, performing calculations within your browser without requiring your mathematical expressions to travel to our servers. We use third-party services including Google AdSense for advertising and Google Analytics for usage analysis. These services may collect standard browser information and use cookies and similar technologies. You can control cookies and advertising through your browser settings and through the opt-out mechanisms described in this policy. If you have questions, please contact us at xin_yu@7986455.xyz.