Privacy Policy

Effective September 18, 2026. This is a standard website policy for a free online game, not legal advice.

Checkerso, Inc. (“Checkerso,” “we,” or “us”) operates checkerso.com (the “Service”). This Privacy Policy describes what information is involved when you play. It is meant for a U.S. audience.

Accounts are optional

You can play without creating an account, signing in, or giving us your name or email. You may choose to sign in with Google to keep your progress on more than one device (see “Optional account” below). We do not currently run advertising on the Service, and we do not currently use third-party analytics cookies.

Information on your device

The game stores a small amount of data in your browser’s localStorage so play can continue on this device:

• free-play position, moves, and difficulty;
• today’s Daily puzzle progress;
• Daily win dates and days finished without a win;
• finished-game counts on this device, under a random label for this browser (so that games finished on different browsers add up in your account);
• a list of your latest 500 finished games (game, level, result, moves, time, and date) for your profile;
• sound on or off;
• the ids of your last few games, so each one is counted only once in our anonymous totals (see “Anonymous game counts”).

That data stays in your browser unless you clear site data or localStorage for checkerso.com. If you do not sign in, we do not receive a copy of your daily results, stats, or board when you play, and clearing site data resets progress, daily results, and stats on that device.

Optional account

If you choose “Login” and continue with Google, Google tells us your email address and a stable account identifier, and we store them with your account. We do not receive your Google password. We use the account only to save your progress and show it to you again when you sign in.

When you click Login, your browser loads Google’s sign-in script and button from accounts.google.com, so Google receives that request under its own privacy policy. We receive nothing from the window except the signed sign-in token Google returns after you choose an account.

• What we store for a signed-in player: your Google email address, an account identifier, the name and profile picture link Google shares (the picture is shown next to your Login menu and on your profile; we do not keep a copy of the image), your finished-game counts and best results, your Daily win and missed dates, and the list of your latest 500 finished games shown on your profile, along with a last-updated time.
• What we do not store in your account: your board, your moves, your settings, or sound preference. Those stay in your browser.
• Who handles it: the account and saved progress are stored with Supabase, a database and sign-in provider, and sign-in is performed by Google, each under its own terms and privacy policy.
• How long: until you delete the account. Choose “Delete account” at the bottom of your profile page to remove your account and the saved progress. Progress on your own device is kept.

Signing in also stores a sign-in session in your browser’s localStorage. We do not use your account information for advertising and we do not sell it.

Feedback

If you send feedback, we store your message, the kind you chose, and an email address only if you type one (we use it to reply and for nothing else). Unless you untick the box, we also store the page you came from, your language, your screen size, and your browser type. You can attach up to three screenshots: they are shrunk and re-saved as plain images, which removes any location or device data the file carried. Please do not include personal information in a screenshot. If you are signed in, the message is linked to your account.

Feedback is stored with Supabase and read by us in its dashboard or on a private page only we can open. We keep it as long as it helps improve the game and delete it when you ask us to (see Contact). We do not use it for advertising.

Anonymous game counts

When a game starts and when it finishes, the site adds one to a daily total. Each total is for one day, one game (such as American checkers or Pool checkers), one level, and one mode (against the computer, a friend, two players on one device, or the Daily puzzle), and it records how the game ended. A total holds no account, no email, no IP address, no cookie or device identifier, and nothing about your moves, so it cannot be traced to you. We use the totals to see which games people play. They are stored with Supabase and are kept as long as they are useful.

Progressive web app

If you install Checkerso, a service worker may cache pages and assets on your device so the app can open faster. You can uninstall the app and clear cached files in your browser settings.

Hosting and technical logs

The Service is hosted on Cloudflare Pages. Like most websites, requests pass through Cloudflare’s network. Cloudflare may process technical information such as IP address, browser type, and timestamps in order to deliver and protect the site, under Cloudflare’s own terms and privacy policy. We do not use those logs to identify you as a player.

Cookies and ads

We do not currently set advertising or analytics cookies. If we add ads or similar third-party services later, we will update this policy before they go live.

Children

The Service is a general-audience checkers game. It is not directed at children under 13, and we do not knowingly collect personal information from children under 13.

U.S. state privacy notices

We do not sell or share personal information as those terms are used in U.S. state privacy laws such as the California Consumer Privacy Act. We do not collect sensitive personal information to profile you. Play is anonymous and device-local unless you sign in. If you sign in, you can delete your account and its saved progress yourself on your profile page, and you can contact us for a copy of what is stored. If you do not sign in, we typically cannot fulfill access or deletion requests for a named person beyond what you can already do by clearing site data in your browser.

Your choices

You can stop using the Service at any time. You can clear checkerso.com data in your browser to remove localStorage and cached files. Blocking localStorage may keep the game from saving a daily result or a position.

Changes

We may update this policy. The effective date at the top will change when we do. Continued use after an update means you accept the revised policy.

Contact

The operator is Checkerso, Inc., named in the site footer, at checkerso.com. See also our Terms. This policy is a standard website policy, not legal advice.