Cookies Policy

Last updated: June 4, 2026

1. What are cookies?

Cookies are small text files stored on your device by your browser when you visit a website. They allow the site to remember your actions or preferences over time. Similar technologies include localStorage and sessionStorage.

2. Cookies we use

2.1 Essential (no consent required)

Necessary for the Service to function. You cannot opt out of these and still use the Service.

sb-* (Supabase auth) — Keep you logged in — Supabase — Session / up to 1 year
cookie_consent — Remember your cookie choice — Refine Chess — 1 year
language_preference — Remember your language (IT/EN) — Refine Chess — 1 year (localStorage)

2.2 Analytics (consent required)

Help us understand how the Service is used so we can improve it. Opt in or out via the cookie banner.

ph_* (PostHog) — Anonymized product analytics — PostHog (EU Cloud) — 1 year

PostHog runs on EU servers. We do not use it for advertising or third-party data sharing.

2.3 Third-party via OAuth

If you log in with Google, Google may set cookies on its own domain (not on refine.coach). Governed by Google's privacy policy.

3. We do NOT use

Advertising cookies
Social media tracking cookies
Cross-site tracking cookies

4. How to manage cookies

4.1 Via Refine Chess

First visit: choose "Accept all" or "Essentials only" in the cookie banner
Change later: click "Manage cookies" in the footer to reset your choice

4.2 Via your browser

You can also disable cookies in your browser settings. Disabling essential cookies will prevent login.

Chrome: Settings → Privacy and security → Cookies
Firefox: Settings → Privacy & Security
Safari: Preferences → Privacy
Edge: Settings → Cookies and site permissions

5. Changes to this policy

We may update this Cookies Policy. Material changes will be notified via email.

6. Contact

Questions: support@refine.coach