Your privacy, in plain language.
You can play and learn without an account. Your game progress stays in your browser unless you choose to send it.
Looking to remove your information? Open Settings → Privacy & data. You can clear this device’s data or delete your account and its online data.
What we store and why
| Information | Where and why |
|---|---|
| Racks, saved games and reviews, coach profiles, game styles, preferences, simulation results, lessons and tutorial activity | Stored in your browser to remember progress and settings. A backup of device progress may also be kept locally when you load a cloud save. |
| Account details and sign-in sessions | Clerk handles authentication. If you sign in, it processes the identifiers and profile details supplied by you or your sign-in provider, such as email, name and profile picture. Our database uses your account ID to associate saves and reports with you. |
| Cloud save | Cloudflare D1 stores a copy of supported game and preference data when you select “Save this device to cloud.” Saving and restoring are manual; signing in alone does not upload your game. |
| Support reports | The report category, title, description, account ID, dates and our response are stored when you send a report. An optional attachment includes saved game context, settings, moves, app/browser details and recent technical activity. You can review it before sending; it is off by default. |
| Service and security information | Cloudflare and Clerk process connection and security information needed to deliver and protect the service, which may include IP addresses, request details and authentication activity. |
Your choices
Local play does not require sign-in. You choose whether to save online, submit a support report, or attach diagnostic context. Tutorial activity and lesson progress are stored locally; the app does not automatically send a usage feed. Downloading a report or tutorial activity saves a file to your device—it does not send it to us.
If you select a tile photograph, the browser displays it locally. The separate “Recognize photo (online)” action attempts to send the photograph to the configured recognition endpoint. Automatic recognition is not provided by the current standard deployment. Use manual tile entry if you do not want to send an image.
Cookies and service providers
We use browser storage for app progress and preferences. Clerk uses cookies and related session mechanisms for sign-in. The app does not include advertising trackers, sell your personal information, or automatically share your games for marketing or research.
Cloudflare hosts the service and database; Clerk supplies sign-in. They process information to provide those services. Their policies describe their own processing: Cloudflare Privacy Policy and Clerk Privacy Policy. Information may be processed outside your country. We may also disclose information when required by law or necessary to address misuse or security threats.
Keeping and deleting data
Browser data remains until you clear it, your browser removes it, or the app replaces an older record. Cloud saves and submitted reports remain until you delete your account or request their removal through support. Signing out does not clear device data.
Clear data on this device removes this app’s saved browser data, including restore backups, learning progress and preferences. It keeps your sign-in account, online saves and reports.
Delete all my information removes your cloud save, submitted reports and attachments, sign-in account, and this browser’s saved app data. You must sign in and confirm first. If a step fails, the app explains what happened and offers a retry; it does not report full deletion as complete.
We retain a one-way fingerprint of the deleted account ID and the deletion date solely to prevent old sessions from recreating deleted app records. It does not contain your name, email, game data or reports. Service-provider backups and security logs may persist under their retention processes; this control does not promise immediate removal from every backup or log.
Copies on other devices, other browsers or previous site addresses, and files you downloaded or shared, are outside this browser’s control. Clear those separately. The deletion confirmation page explains these limits.
Requests and questions
Use Contact & support for privacy questions or requests to access, correct or remove information. Sending a report currently requires sign-in so we can associate the request with your account. If deletion is unavailable, submit your request before deleting your sign-in account. Please omit sensitive information that is not needed to handle your request.
Your rights depend on the law that applies to you. This statement does not limit those rights. We update this page when our practices change and show the revision date above.