Nexa chess
Cookies and local storage policy
Last updated: 11 April 2026 (2026-04-11)
1. Technologies we use
In addition to HTTP cookies sent automatically when the authentication provider sets them, Nexa chess uses browser local storage (localStorage) for preferences and dashboard cache. For transparency this may be treated like persistent cookies.
2. Summary table
| Name / key | Type | Purpose | Duration |
|---|---|---|---|
| Supabase Auth session cookies (names managed by Supabase) | HTTP cookie (technical, third party on your domain) | Keep you signed in securely after login. | Session or period defined by Supabase / project settings. |
chess-metrics:theme | localStorage (first party) | Remember light or dark theme. | Until you clear site data or change browser. |
chess-metrics:language | localStorage | Remember UI language (ES/EN). | Persistent on device. |
chess-metrics:profile:v2:* (prefix + user id) | localStorage | Local cache of Lichess/Chess.com profile per signed-in account for faster dashboard load. | Persistent; can be cleared in the browser. |
| Dashboard cache keys (bootstrap / games) | localStorage | Reduce repeated API calls and improve UX. | Persistent; the app may invalidate old entries. |
chess-metrics:cookie-consent-v1 | localStorage (JSON) | Consent version, date, language and whether you accepted analytics (analytics: true/false). | Persistent. |
_ga, _ga_* (GA4) | HTTP cookie (third party, if Google Analytics is enabled) | Distinguish users and sessions for aggregated reports. Only if you click “Accept analytics”. | Up to 24 months per typical GA4 settings. |
_gid | HTTP cookie (third party, GA) | Short-lived session identifier. | Typically 24 hours. |
| Plausible / Vercel Analytics cookies | Cookie or script per integration | Aggregated usage metrics. Only if integrated and you accepted analytics. | Per provider documentation. |
Exact names may vary by SDK version and project configuration.
3. Analytics cookies (consent only)
Nexa chess may integrate audience measurement (e.g. Google Analytics 4, Plausible Analytics or Vercel Analytics). These are not enabled until you choose “Accept analytics”. If you choose “Necessary only”, you can still use the app with technical cookies and functional local storage, without third-party measurement signals.
4. Behavioural advertising
We do not use cookies for behavioural advertising or third-party remarketing.
5. How to revoke or delete
You can delete cookies and site data from your browser settings. If you remove session cookies you will need to sign in again. If you clear localStorage you will lose local preferences, dashboard cache and consent record: on reload the cookie banner will appear again.
6. More information
For personal data beyond cookies, see the privacy policy.