Privacy Policy

Last updated: April 2026

What data we collect

Sumcraft does not require you to sign up, log in, or provide personal information to use our calculators. Numbers entered into calculators are processed in your browser and not sent to our servers.

We collect limited, anonymous analytics data to understand which pages are used and how to improve the site. This includes: pages visited, time on page, approximate location (country/region level), browser type, and device type.

Cookies

We use cookies for analytics and, once the site is monetised, for advertising. You can disable cookies in your browser settings. Doing so will not affect your ability to use the calculators.

Advertising

Sumcraft may display ads from third-party ad networks including Google AdSense. These networks may use cookies and similar technologies to show ads relevant to your interests based on your browsing activity across the web. You can opt out of personalised advertising at Google Ad Settings and YourOnlineChoices.

Analytics

We use Google Analytics to understand site usage. Google Analytics uses cookies to collect anonymous information about site visits. You can opt out using the Google Analytics Opt-out Browser Add-on.

Your rights under UK GDPR

If you are in the UK or EU, you have rights under the UK GDPR and GDPR to access, correct, or delete personal data we hold about you. Because we do not collect personal accounts or identifying information, these rights typically apply only to anonymous analytics data.

Third-party links

Our site links to external resources such as gov.uk and HMRC. We are not responsible for the privacy practices of those sites.

Changes to this policy

We may update this policy from time to time. The "Last updated" date at the top of this page indicates when it was last changed.

Contact

If you have questions about this privacy policy, please use our contact page.