Privacy Policy

Last updated:

This Privacy Policy explains how Websums ("we", "our") handles information when you use this website.

What we collect

Calculations entered into our tools are processed entirely in your browser. The figures you type — incomes, prices, balances, expenses — are never transmitted to us and are never stored on our servers.

We may collect anonymous analytics data (page views, device type, approximate location) to understand how the site is used.

What stays on your device

The following are stored locally in your browser using localStorage. They never leave your device and we cannot see them:

  • Saved calculations ("My Sums") — when you click Save to My Sums, the inputs and labels are written to localStorage on your device. Clearing your browser data, or using a different browser or device, will remove them.
  • Preferences — your chosen currency (£ / $ / €) and light/dark theme.
  • Cookie consent choice — whether you accepted or declined non-essential cookies.

You can clear all of this at any time via your browser's site-data settings.

Sharing a calculation

When you use the Share button on a saved calculation, the inputs are encoded directly into the share URL. The link travels with whatever you send it through (message, email) — it does not pass through our servers, and we have no record of who shared what with whom.

Essential vs non-essential storage

UK and EU rules (PECR / GDPR) split browser storage into two categories:

  • Essential — required to deliver something you've explicitly asked for. On Websums, this is the browser localStorage described above: your saved sums, your currency and theme preferences, and your cookie consent choice. We don't ask for consent for these because the site can't honour your Save click or remember your settings without them. None of this is sent to us.
  • Non-essential — personalised advertising and analytics cookies set by Google. These require your consent.

Advertising and your choice

Websums is supported by ads served via Google AdSense. The banner at the bottom of the page lets you choose how those ads work:

  • Accept — Google may set cookies to show ads tailored to your interests (personalised ads). This typically means ads more relevant to you and helps support the site.
  • Decline — Google still shows ads, but they will be generic (non-personalised), with no tracking cookies set for ad targeting.

Either way, ads will appear; ad-blocking is something you can do via your browser, not via this banner. We do not set our own first-party tracking cookies. You can change your choice at any time by clearing your browser data and reloading the page.

Google Ads

This site is supported by Google AdSense. Google and its partners may use cookies to serve ads based on your prior visits to this and other websites. You can opt out of personalised advertising by visiting Google Ads Settings.

Your rights

If you are in the UK or EU, you have rights under GDPR including access, rectification, and erasure. Contact us at hello@websums.com.

Contact

Questions? Email hello@websums.com.