Privacy Policy

fibercalc doesn't have accounts, and there's no server of ours storing anything about you. There's nothing to sign up for, and we don't collect anything about you ourselves. The one exception is the advertising described below, which is handled by Google rather than by us.

The numbers you enter into a calculator, and any progress you save while working through a pattern, are stored only in your browser's local storage. That data stays on your device — it's never sent to a server, and we never see it. Clearing your browser data or using a different browser or device will clear it too.

Advertising

fibercalc is free because it's supported by advertising. Ads are served by Google AdSense. Google is a third-party vendor and uses cookies and similar technologies to serve ads, to measure how they perform, and — where permitted — to personalise the ads you see based on your previous visits to this and other websites. We don't receive or store any of that data ourselves.

You can turn off personalised advertising at Google Ads Settings, or opt out of third-party vendors' use of cookies for personalised advertising at aboutads.info. Turning personalisation off doesn't remove ads — it only makes them less relevant.

If you're in the EEA, the UK, or Switzerland, you'll be asked for your consent before any non-essential cookies are set, and you can change or withdraw that choice at any time.

Analytics

We don't run analytics on this site today. If that changes, this policy will be updated before it does.

Who runs this site

fibercalc is made and operated by Pious Angel. This policy was last updated in July 2026.

Questions about any of this are welcome — see the Contact page.