Privacy
Last updated 14 November 2026
Zeist is a set of games at zeist.gg and in the Zeist app. You can play every game without an account. This page says what we keep when you make one, and what we never do.
Without an account
Games save your progress, streaks and settings in your own browser or device. That data stays there; we don't receive it, apart from the games against the chess computer below.
Games against the chess computer
When you finish a game against the computer in Chess on the web, signed in or not, we keep its moves, the level, the side you played and the result, to make the computer play better. They are kept without your name, account, email or IP address, and with nothing else that could tell us who played, only the day they arrived. Because they can't be linked to you, they aren't part of your account's download or deletion. Games with a friend and puzzles aren't kept this way.
With an account
| Your name and email | From the account you sign in with (Apple or Google). Only you see them, on your settings page. We use your email only to reach you about your account. |
| Your username | Public, along with the mark drawn from it. |
| Your public name | Only if you add one in settings. Public, on your profile. It is never taken from the account you sign in with. |
| Your picture | Only if you add one, or if the email you sign in with already has a Gravatar: we check once, at sign-in, and never for Apple's relay addresses. Public, on your profile and in lists. You can remove it in settings. |
| Profile links | Only the ones you add. Public. |
| Games you finish | The game, the result and the score, so your profile can show them. For daily puzzles, rated games and games against a friend, the moves too, so we can check the result. Games you played on this device before signing in are added when you sign in. |
| Ratings and milestones | Worked out from games we checked. Shown on your profile, which you can make private. |
| Notifications | Only if you turn them on: an address from your browser or from Apple to send them to. Removed when you turn them off or sign out. |
| Follows and blocks | Who you follow is visible on your profile counts. Blocks are never shown to anyone. |
| Chess puzzle progress | Which puzzles you solved or saw, and where you are in them. The moves that solve a puzzle are checked when they arrive and not kept. Kept with your account so it follows you across devices and between Zeist and Zeist Chess. The number you solved shows on your profile, which you can make private. Puzzles count toward no rating or rank. |
| Sign-in records | Which providers you've connected, and an ID each one gives us, so you can sign in again. |
| Reports | If you report a player, we keep that report to count it against their profile. |
If you sign in with Apple and choose to hide your email, we only ever see Apple's relay address.
Counting visits
We use Google Analytics to count visits and finished games, so we know which games people play and where they find us. It never receives your name, email or username. In the EU, the UK and Switzerland we ask first: until you say yes, it sets no cookies and only counts the visit without remembering you, and we ask once. The app uses Google's Firebase Analytics in the same way, without advertising identifiers. In the app, you can turn it off or on at any time in Settings, under Count my visits; when it's off, the app sends nothing.
Cookies
One cookie keeps you signed in, for up to 90 days. A second, short-lived one protects the sign-in step itself and is gone within minutes. Google Analytics sets its own cookies only where you've allowed it, or where no permission is needed. There are no advertising cookies.
What we never do
- Sell or share your data with anyone for advertising, or use it for ads.
- Show ads.
- Let other players message you. Zeist has no messages of any kind.
- Show your name or email to anyone else.
Where it's kept
Zeist runs on Cloudflare, which stores the account database and briefly keeps request logs to run the service. Sign-in goes through the provider you choose, under their own privacy policy.
Deleting your account
Settings has a Delete button. It removes your username, name, email, picture, links, follows, ratings and sign-ins straight away, and ends Zeist's access to your Apple account if you signed in with Apple. Game progress saved on your device stays there until you clear it.
Your rights
Settings can download a copy of everything we hold about you. You can also ask for one, ask us to correct it, or ask us to delete it. Zeist is run by Amrith Shanbhag in the Netherlands, and the EU's GDPR applies. You can also complain to the Dutch data protection authority, the Autoriteit Persoonsgegevens.