01What we store in your browser
| Name | Type | Purpose | Kept for |
|---|---|---|---|
| bt_session | Cookie | Keeps you signed in. Signed and readable only by the server. | 30 days |
| bt_ref | Cookie | Remembers who invited you, if you came through an invite link, so the invite counts when you sign up. | 30 days |
| Solo preferences | Local storage | Your last risk, reward and session length in Solo, so you don't pick them again. | Until you clear it |
| Solo session | Session storage | The progress of the Solo session in this tab. | Until the tab closes |
02Visit statistics without cookies
We count page views and measure loading speed with Vercel Web Analytics and Speed Insights. They store nothing in your browser, don't follow you across sites and don't identify you; we only see totals such as views per page, countries and device types.
03Why there is no cookie banner
All of the above are strictly necessary for features you ask for (signing in, an invite, your saved settings), so they don't need consent. If we ever add optional cookies, we will ask first.
04Your control
You can delete cookies and site data in your browser settings at any time. Without the session cookie you will be signed out, and without the others your settings and invite will be forgotten.
05Contact
Questions about this document can be sent to the ArenaR team; a support address will be published here.