Privacy Policy

Last updated: 26 September 2026 · Applies to the blackjacksolitaire.com and solitaire21.com websites and the Solitaire 21 mobile app (Android).

Blackjack Solitaire and Solitaire 21 are the same single-player card game, made and run by Think Beyond Limited, which is responsible for the data described here. It works without an account, and we collect as little as we can get away with. This page lists everything the websites and the mobile app store or send, in plain language.

The short version

• No account, no sign-up, no password — the game just plays.
• Your saved games, history, and settings stay on your device.
• We receive gameplay data (cards played, scores, which screens you open, error reports, and which website or campaign link brought you to the site) to balance the game and fix bugs. It carries a random install ID the game creates — not your name, email, or advertising ID — and you can switch it off in Settings → Privacy → Share gameplay data.
• Leaderboards are public: a Classic score you submit, and the display name you choose for it, can be seen by anyone.
• No third-party analytics, no ads, no tracking cookies — on the websites or in the mobile app. The gameplay data above goes only to our own server.
• We never sell data, and we only hold a name or email address if you choose to send it to us.

Data stored on your device only

Saved games, score history, preferences (theme, sound, language), and active challenges are kept in your browser's or the app's local storage. They never leave your device as personal data, and Settings → Clear All Data erases them.

Gameplay data

While Share gameplay data is on (the default), the game sends batches of events to our server so we can tune the scoring and find bugs:

• Play — cards drawn and placed, hands completed or busted, scores, game length, and how you placed a card (tap, drag, or keyboard).
• App use — screens and menus you open, tutorial steps, settings you change, app start and background, and the app version, platform, and a rounded screen size.
• Error reports — when the game hits an error: the error message, file, line, and a short technical trace. No page content or anything you typed.
• Where a visit came from (websites only) — when you open the game or a shared score, the name of the website that linked you there (for example google.com — never the full address of that page) and any campaign tags in the link you followed (utm_source, utm_medium, utm_campaign, utm_content, utm_term). The app sends none of this.

Events carry a random install ID the game creates the first time it runs and keeps on your device. It is not derived from your device, name, account, or advertising ID, but it does let us see that several sessions came from the same installation. Each batch also carries a session ID that is discarded when you close the game. If you play offline, batches wait on your device and are sent when you are next online.

Turning it off: switch off Settings → Privacy → Share gameplay data. From then on this device sends no gameplay data, and anything still waiting to be sent is deleted. Because leaderboards and challenge links send the same install ID, they switch off too: finished runs are not submitted, the public boards are hidden, and challenge links cannot be opened. Your own history stays on your device. Turning it back on does not send anything from while it was off.

Leaderboards

When you finish a Classic game with gameplay data sharing on, the game submits the run (the deal and your moves, so our server can re-score it), the install ID, and the session ID. If the score places, it appears on the public Top 100 board. You can give it a display name of up to 10 letters and digits — it is shown to everyone, so don't use your real name if you'd rather not. Leave it blank and the row stays anonymous.

Data you choose to send us

• Feedback form — your message, an optional name and email if you provide them.
• Playtest sign-up — the email address you submit, used only to manage playtest access.
• Challenge links — when you share or open a "beat my score" challenge, the shared record contains your install ID, the mode, scores, and any label you type. Don't put personal information in a challenge label. Challenge links only work while gameplay data sharing is on.

Hosting

The website, app services, and data above run on Cloudflare (Workers, KV, D1). Cloudflare processes network logs (such as IP addresses) as any host does, to serve and protect the site.

Retention and deletion

Operational backups of the data listed above are kept for up to 84 days. To erase everything on your device, use Settings → Clear All Data. To have any server-held data connected to you removed (gameplay data, leaderboard scores and names, playtest email, feedback, challenge records), use Settings → Privacy → Request data deletion or email us — we honour deletion requests against live data and backups.

Children

The game is not directed at children under 13, and it never requires a name, email address, or account to play.

Changes

If we ever add features that change what is collected (for example, optional accounts or purchases), this page will be updated before those features ship, with the date above.

Contact

Think Beyond Limited. Privacy questions and deletion requests: blackjacksolitaireprivacy@thinkbeyondlimited.ie