Privacy Policy
What this site collects, what it does not, how third-party scripts behave, and your rights.
The short version
Every calculation runs in your browser. There is no backend endpoint, and the numbers you type never leave your device.
What we collect
| Category | Content | Purpose | Retention |
|---|---|---|---|
| Analytics events | which tool was used, which button was clicked, search query length, result count, language | Work out which content is useful and which pages are broken | 14 months (GA4 default) |
| Site preferences | language choice, browser type, kept in local storage | Remember your selection | Until you clear it |
Explicitly not collected: values entered into any tool, the full text of anything you type in the search box, any contact details you enter. Every form on this site computes locally — there is no submit action.
Third-party scripts
We may use the following third-party analytics services, which set cookies in your browser:
- Google Analytics (GA4): for traffic measurement. IP anonymisation is on, advertising personalisation is off, and user-level data is not shared with third parties.
- Google AdSense (may be enabled later): for ad serving. If enabled, Google will serve ads based on your browsing and may write third-party cookies.
If you would rather not be tracked, use an ad blocker or enable "Do Not Track". This does not affect any tool — nothing here depends on analytics.
Cookies
- First-party: currently only to remember language preference.
- Third-party: only from the analytics services above.
- You can clear all cookies and local storage in your browser at any time; no feature depends on them.
Cross-border transfers
With analytics enabled, your visit data is transferred to the provider's servers (Google, in the United States and elsewhere). We do not transfer your data to any other third party, and we do not sell or rent user data.
Your rights
You have the right to:
- know what we collect — it is fully listed in the table above;
- block or clear cookies and local storage via your browser;
- ask us by email to delete statistics associated with you (we cannot identify an individual from within a browser, but we can delete records we hold);
- request corrections to any content on this site.
Changes to this policy
When the policy changes, the date at the top of this page is updated. Material changes are announced on the home page.
Children
This site is not directed at minors and does not collect personal information from them.