Cookies and privacy
This page explains the cookies and local browser storage used on RiverMath and how you can change or withdraw your consent at any time.
Strictly necessary storage
We store your cookie preference in localStorage and in a first-party cookie named rivermath_cookie_consent (for up to 12 months). Your colour-theme preference (light, dark or system) is saved in localStorage as rivermath.theme.v1, and your local calculator history stays on your device. None of these are used for advertising.
Optional analytics cookies
Only if you click “Accept analytics”, we load Google Analytics 4 (measurement ID G-SVM68TGM9C on RiverMath) to understand page views and calculator usage. The script does not load unless you opt in.
What Google Analytics stores
After consent, Google Analytics sets cookies such as _ga and _ga_SVM68TGM9C (retained for roughly two years) under Google’s privacy policy.
How to change or withdraw consent
Use the buttons below or click “Cookie settings” in the footer at any time. Switching to “Necessary only” stops Google Analytics from loading and expires existing _ga cookies.
No choice recorded yet. Analytics remains off until you accept.