Vision Gambit Chess — Privacy Policy

Last updated: November 7, 2026

This policy explains what the Vision Gambit Chess browser extension ("the extension") collects, why, and how it is handled.

What the extension does

The extension shows the best chess move and an evaluation for the position on the chessboard you are viewing, in a panel next to the board. To do this it sends the position to an analysis server and displays the result.

Data we process

• Chessboard positions (FEN) from supported chess pages you open, and the analysis settings you choose (depth, number of lines, play style), to compute moves.
• Your username on the chess site, when the page shows one, to attribute daily usage and your plan.
• An anonymous access key generated by the extension and stored in your browser, to identify your plan (free or Premium).
• Country code derived from your browser language, for pricing and language.
• Feature usage counters (which settings are turned on or off), sent in batches, to improve the product.
• IP address, received by the server as part of any internet request, used to apply the free daily limit and to prevent abuse.

What we do not collect

The extension does not read or send your passwords, messages, browsing history, or the content of pages that are not supported chess boards.

Payments

Premium purchases are processed by Stripe on Stripe's own checkout page. We do not receive or store your card details. Stripe's privacy policy applies to the payment.

Storage on your device

Settings, the access key, your plan status and a cache of already analyzed positions are stored locally in your browser. You can remove them at any time by uninstalling the extension.

Sharing

We do not sell your data. We do not share it with third parties except the service providers needed to run the extension (server hosting and the payment processor), and only for that purpose. Data is not used for advertising, creditworthiness, or lending.

Retention

Usage records are kept only as long as needed to apply daily limits, manage your plan, and keep the service working.

Chrome Web Store Limited Use

The use of information received by the extension adheres to the Chrome Web Store User Data Policy, including the Limited Use requirements.

Changes

If this policy changes, the new version will be posted on this page with a new "Last updated" date.

Contact

Questions about this policy: open an issue at github.com/Joarle/vision-gambit-chess-privacy.