Privacy

What we store

You never need an account to play. Signing in is optional.

• Two essential cookies: theme remembers day or night, and cf_consent remembers your cookie choice.
• If you sign in with Google, we keep your account: the email, name and picture Google shares with us, and when you signed in. A session cookie keeps you signed in for 30 days while you use the site. Delete your account on your account page and all of it goes.
• Your saved progress and player settings, in your browser's local storage. They stay on your device and are never sent to us. Clear your browsing data and they are gone.
• If you rate a case after solving it, we keep your rating (how much you enjoyed it and how hard it felt) with a random ID for your browser, so each case keeps one rating from you. The ID identifies nothing else. Setters only ever see totals.
• A few short-lived notes in your browser's session storage, so an event such as “started a case” is counted once. They end with the tab.

Every cookie and storage key, what it does and how long it lasts, is listed on Cookies.

Analytics

We use Google Analytics 4 through Cloudflare Zaraz to learn which cases and pages people use. We load no Google script ourselves; Zaraz sends the data from Cloudflare.

Analytics run only after you agree. Say no and nothing is collected.

What we collect:

• Pages visited, how you arrived (such as a YouTube or Discord link) and rough device and country details, as Google Analytics reports them.
• A handful of product events: starting and solving a case, opening or playing a video, following a suggested or “next” case, settling the case filters and following a link to our Discord, YouTube, Patreon or Ko-fi.
• Those events carry case numbers, video ids, variant tags, difficulty and timings. Never personal data and never free text: for a search we send its length, not the words.

Change your mind at any time on Cookies, linked at the foot of every page.

No ads, no selling

We show no ads and we do not sell or share your data with anyone.

Other sites

Links to YouTube, Discord, Patreon and Ko-fi take you to their sites. Each has its own privacy policy, and what you do there is between you and them.

Our video pages show a picture of each video, fetched from YouTube’s image server, until you press play. Only then does the player load, from YouTube’s privacy-enhanced domain (youtube-nocookie.com), and YouTube’s own privacy policy applies to it.

Contact

Questions about your data? Write to privacy@sudoku-sleuth.com.