Privacy Policy
What information we collect, how we use it, and your rights.
What we collect
- Usage data. We collect anonymised data about how visitors use the site: pages viewed, time on page, browser type, and general location (country/region level). This data contains no personally identifiable information.
- Contact information. If you contact us by email, we store your email address and the content of your message in order to respond. We do not add you to any mailing list without explicit consent.
- Cookies. We use functional cookies to remember your preferences (such as card display settings), and our analytics provider sets cookies to measure traffic. Google AdSense also sets advertising cookies; see “Advertising (Google AdSense)” below.
How we use information
- To improve the site. Anonymised usage data helps us understand which content is useful and where the site can be improved.
- To respond to enquiries. Contact information is used only to respond to your message.
- We do not sell data. We do not sell, rent, or share any personal information with third parties for commercial purposes.
Third-party services
We use a small number of third-party services to operate the site, including analytics (to understand traffic patterns) and infrastructure providers. These services process anonymised data only and are bound by their own privacy policies. We do not use data brokers.
Advertising (Google AdSense)
This site shows ads served by Google AdSense. Google and its partners use cookies to serve ads based on your prior visits to this website and other websites. Google’s use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and/or other sites on the Internet.
You can opt out of personalised advertising by visiting Google Ads Settings, or opt out of some third-party vendors’ use of cookies for personalised advertising at aboutads.info. Where required (for example in the EEA and UK), we ask for your consent before personalised ads are shown. Learn more in how Google uses cookies in advertising.
Ads are labelled, are chosen by Google, and are separate from our rankings: no advertiser can pay to be included, left out, or ranked higher.
Your rights
You have the right to request access to any personal data we hold about you, to request its deletion, and to opt out of any data collection. To exercise these rights, contact us at contact@bythemath.com. We will respond within 30 days.
Last updated: October 2026