Privacy Policy
Last updated: 5 June 2026
Overview
Trefid provides free online calculator tools. The site does not provide user accounts or backend forms, and we do not ask visitors to create a profile to use the calculator.
Information you choose to send
If you contact Trefid by email, we receive the information included in your message, such as your email address, name if provided, and the content of your enquiry. We use that information to respond to your message and keep basic correspondence records.
Cookies, analytics, and advertising
Trefid may use cookies, analytics, and advertising technologies to understand site usage, improve the calculators, and support the service. If Google AdSense or other Google advertising services are used on Trefid, Google and its partners may use cookies or similar technologies to serve and measure ads.
- Third-party vendors, including Google, may use cookies to serve ads based on a user's prior visits to Trefid or other websites.
- Google's use of advertising cookies enables Google and its partners to serve ads based on visits to Trefid and/or other sites on the Internet.
- Users can opt out of personalised advertising by visiting Google Ads Settings. Users can also learn about opting out of some third-party personalised advertising at aboutads.info.
For more information about how Google uses information from sites or apps that use its services, visit Google's partner sites policy.
Consent choices
For visitors in the European Economic Area, the UK, or Switzerland, Trefid will use a Google-certified consent management platform where required before serving ads that require consent. Consent settings may affect whether personalised or non-personalised ads are shown.
External links
Trefid may link to external websites for reference. We are not responsible for the privacy practices or content of those websites.
Changes to this policy
We may update this policy as Trefid adds tools, analytics, advertising, or other site features. The latest version will be published on this page.
Contact
For privacy enquiries, contact hello@trefid.com.