| sb-…-auth-token | Supabase auth | Keeps your sign-in session available across visits and refreshes authentication tokens. | localStorage | The access token is short-lived and refreshed while you stay signed in. The stored session is removed when you log out or clear site data. | Essential for persistent sign-in. |
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| yc-consent | Us | Records an analytics choice: accepted or rejected. In production, the banner only appears when analytics are configured, which they are not; this is not consent to all browser storage. | localStorage | No automatic expiry; replaced by a new choice or removed when you clear site data. | User-requested consent preference; does not activate analytics while they are unconfigured. |
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| yc-recent-tools | Us | Automatically remembers up to 8 recently opened or used tool IDs for shortcuts. Contains no file names or file contents. | localStorage | No automatic expiry; the list changes as you use tools, or is removed when you turn remembering off or clear site data. | Functional, stays on this device; you can turn it off below |
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| yc-study-sets | Us | Stores study sets you choose to save, including cards, quizzes, study guides and review progress, in this browser. | localStorage | No automatic expiry; kept until you delete the set or clear site data. | Needed for the study-set saving feature you request. |
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| yc-last-result:… | Us | Automatically stores the latest AI text result per tool and, for some tools, its source input, so work can be restored after a reload, plus up to 5 recent results per tool that you can reopen, remove or clear. | localStorage | No automatic expiry; the latest result is overwritten by the next one and the recent list keeps only the last 5, or they are removed by the tool's clear actions, when you turn remembering off or when you clear site data. | Functional, stays on this device; you can turn it off below |
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| yc-study-match-best | Us | Automatically remembers your best Match game time for each saved study set. | localStorage | No automatic expiry; updated by a faster time or removed when you turn remembering off or clear site data. Deleting a study set does not clear this separate record. | Functional, stays on this device; you can turn it off below |
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| yc-entitlements | Us | Caches the last server-provided plan and subscription details for immediate display on reload. Access is still decided by the server. | localStorage | No automatic expiry; refreshed after a successful fetch, cleared when no signed-in session is found, or removed when you turn remembering off or clear site data. | Functional, stays on this device; you can turn it off below |
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| yc-translator-side-by-side | Us | Remembers whether to show the AI Translator source and translation side by side. Contains no translated text or source input. | localStorage | No automatic expiry; replaced when you change the view or removed when you turn remembering off or clear site data. | Functional, stays on this device; you can turn it off below |
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| yc-remember | Us | Remembers whether to save functional data on this device: on or off. Remembering is on by default. | localStorage | No automatic expiry; replaced when you change the switch or removed when you clear site data. | Needed to remember your device-storage preference. |
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| Cloudflare Turnstile | Cloudflare (third party) | Any cookies it may set are set by Cloudflare on challenges.cloudflare.com for bot protection on sign-up, log-in and password reset pages when CAPTCHA is enabled. | Cookie (may be set by Cloudflare) | Cookie names and lifetimes are set by Cloudflare on challenges.cloudflare.com. | Essential for bot protection when enabled. |
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