Privacy Policy

Last updated: 9 November 2026

Katte (katte.fans, "we", "us") is a free card game. This policy explains what information we collect when you use it, why, and the choices you have.

1. What we collect

Guest account. When you play online, we create an anonymous guest account. It has a random ID, the display name and avatar you choose, and your game data: play-money balance, hands played, wins, friends list, and table activity. We do not ask for your real name, email, or password.
Game data. Moves, table codes, chat-style emotes, and results, which are needed to run the game, show leaderboards, and settle the play-money pot.
Usage and device data. Pages and buttons you use, approximate location (from your IP address), browser, device and operating system, and error reports.
Session recordings. We use product analytics that can record how the pages are used (clicks, scrolling, screen changes) so we can find bugs and improve the layout. Text you type into input fields, such as your player name, is masked.
Notifications. If you turn on notifications, your browser gives us a push subscription so we can send daily-claim reminders and invites. You can turn this off in the app or in your browser settings.
Local storage. We store settings and your guest sign-in on your device (local storage and a service worker cache) so the app works and keeps you signed in.

2. How we use it

To run the game, keep your balance and stats, and show leaderboards and friend lists.
To keep the service secure and prevent cheating and abuse.
To measure performance, fix errors, and improve the game.
To show advertising that keeps Katte free (see section 4).

3. Who we share it with

We do not sell your personal information. We use these service providers, who process data on our behalf:

Supabase: database, guest sign-in, game server and realtime messaging.
Cloudflare: hosting and delivery of the website.
PostHog: product analytics and session recordings.
New Relic: performance and error monitoring.
Browser push services (run by Google, Apple or Mozilla, depending on your browser): deliver notifications if you turn them on.
Advertising partners: see below.

Other players can see your display name, avatar, and in-game activity at the table you share. Leaderboards show your display name, avatar and game stats (such as balance and wins). Because you choose the display name and we hold no real-world identity for you, other players cannot tell who you are unless you put identifying details in your name, so please do not. We may also disclose information if the law requires it, or to protect the service and its users.

4. Advertising

Katte may show ads from third-party networks such as Google AdSense. These companies may use cookies or similar technologies to show and measure ads, and, where you consent, to personalise them. Where required by law (for example in the EU and UK), we ask for your consent first. You can opt out of personalised ads at adssettings.google.com and learn more at policies.google.com/technologies/ads.

5. Fake players

Some seats at public tables are played by computer-controlled players, shown with a name and avatar, so tables are not empty. They are not real people, and they do not receive any of your personal information.

6. Retention

We keep guest account and game data for as long as the Service runs, so your balance, stats and friends stay available. You can ask us to delete your data (see section 7). Analytics and monitoring data are kept for a limited time set by those providers. Because guest accounts are tied to your device, clearing your browser data may make your account inaccessible.

7. Your choices and rights

You can change your name and avatar in the app, and turn notifications off at any time.
You can clear local storage in your browser to remove data stored on your device.
Depending on where you live (for example under the GDPR, UK GDPR or CCPA), you may have the right to access, correct, delete or export your data, to object to or restrict some processing, and to withdraw consent. To use these rights, contact us below. Include your player name so we can find your account.

8. Children

Katte is not directed at children under 13, and we do not knowingly collect their personal information. If you believe a child has given us information, contact us and we will delete it.

9. Security and international transfers

We use reasonable measures to protect your data, but no online service is perfectly secure. Our providers may process data in countries other than yours, including the United States.

10. Changes

We may update this policy. The date at the top shows the latest version. Continued use after a change means you accept it.

11. Contact

Questions or requests: [email protected]