What we do not collect
- No sign-up, no email, no real name. Your wallet is the only identity in rounds, and you choose when to connect it; the practice leaderboard's nickname is optional and can be anything you like.
- No cookies, no analytics, no advertising or tracking scripts. Fonts, scripts and images are served from this site itself; the page loads nothing from other companies.
- No selling or sharing of data, because there is no data set to sell.
What your browser keeps
A few preferences live in your browser's local storage and never leave your device: the wallet you connected last (so the site can reconnect it quietly), your unsent card for the open round (so a reload does not lose it), and view settings such as the Decision Index period. Clearing your site data removes them.
What the server sees
The site reads Robinhood Chain through small functions on this domain (/api/rpc, /api/round, /api/board). When you look up your own rounds, your public wallet address is part of that request. Like any website, the hosting provider (Vercel) handles your requests and keeps standard technical logs, such as IP address, time and user agent, for a short period. We do not use them to profile anyone.
The practice leaderboard (optional)
Practice cards stay in your browser unless you join the practice leaderboard. Joining sends a nickname you pick and a random code your browser makes; the server keeps the nickname, a one-way hash of that code (never the code itself) and, for each round you play, your practice card and the time it arrived. Nicknames, scores and the crowd card made from everyone's cards are shown publicly on the leaderboard. No wallet, email or other personal data is asked for. Requests are counted per IP address for a short time to limit abuse; those counts are not stored.
What is public forever
Everything you do in a round is a blockchain transaction: your wallet address, your stake, your probabilities, your payout and the time. It is public, permanent and visible to anyone on Robinhood Chain, and the Decision Index ranks wallets from exactly that public record. Nobody, including us, can delete or hide it. If you want privacy, use a wallet that is not linked to your identity.
Other services you might touch
Your wallet app, Robinhood Chain's network and RPC providers, and X (if you follow the link to @ClefModel) have their own privacy terms. This site does not control them.
Contact
Questions: @ClefModel on X. See also the terms.