Storage and cookie policy
The browser storage used for product preferences and local educational progress.
Blackjack Index asks on the first visit before using optional local storage for settings, training progress and virtual bankroll data. The essential blackjack-index:consent:v1 record saves that choice, and the NEXT_LOCALE preference cookie may remember the selected language.
Microsoft Clarity analytics is optional. Accept all enables local persistence and measurement; Reject optional disables both. Preferences lets you control them separately. Advertising storage remains disabled, and withdrawing measurement consent sends Clarity a denied signal. The consent dialog still offers Accept all, Reject optional and Preferences because optional browser-local persistence is a real choice. Rejecting optional storage removes optional records but keeps the essential choice. The clear-local-data action clears only Blackjack Index namespaces, including consent, and the locale preference; unrelated browser data is left untouched.
Versioned product records remain on this device until you clear them, remove site data in the browser, or a later migration replaces them.