Privacy Policy

Lair of the Dragon · Developer and operator: Sudarev Daniil · Last updated: October 23, 2026

Lair of the Dragon ("the game") is free and has no ads, purchases, analytics or trackers. You can play without an account, and then we collect nothing about you. If you choose to sign in, we keep only the data described below, only to run those features. We never sell your data.

1. Without an account

Games against the computer, the campaign, two players on one phone and Wi‑Fi play need no sign-up. We do not ask for your name, email or phone number. Your settings (sound, music, vibration, hints, language), the player name you type in, an unfinished game, campaign stars and achievements are stored only on your device and are deleted together with the game.

2. Playing over the network

Wi‑Fi nearby. Devices connect directly inside your local network; to find a friend's room the game asks for local network access. Nothing goes to the internet.

Online and “Find opponent”. The room code, your player name and the game moves are passed to your opponent through our server (Supabase Realtime) only while the game is running. “Find opponent” matches you with a random player without registration: the other player sees only your player name and your moves. There is no chat. These messages are not stored. Like any server, Supabase technically sees the connection's IP address.

3. Optional account

You can sign in with Apple. On Android and in the browser you can sign in by scanning a QR code with a phone where you are already signed in. If other sign-in methods (for example Google) are added, the same rules apply.

For an account our server stores: your sign-in ID and email (Apple may replace it with a private relay address), the name from Apple (first sign-in only), your nickname, a friend code, rating and number of wins, losses and draws, results of online games (who played whom and the score), and the friends you added by code. Your nickname and rating are visible to other players on the leaderboard and to your friends; your email is never shown. While the game is open, friends can see that you are online and invite you to a game.

QR sign-in and camera. The camera turns on only when you tap “Scan QR code”, to read an invitation or sign-in code; pictures are not stored or sent anywhere. For QR sign-in the server keeps a one-time code and the device type (“Android”, “Browser”) for 10 minutes, then deletes it.

Delete your account in the game: Settings → Account → “Delete account”. The account, profile, rating, friends and game results are deleted immediately and permanently. The account is shared by Sudarev games on the same server, so deletion applies to all of them.

Delete your account without the game: email [email protected] from the address you signed in with (or give us your nickname and friend code), subject “Delete account”. We delete everything within 7 days and confirm by email.

4. AI mentor

After a game the app shows your biggest mistakes on the device. If you are signed in and ask the AI mentor to explain them, a short description of those moments (the move made, a better move, the score) is sent to our server and to the AI provider Anthropic to write the answer. Your name and email are not sent. To keep the free limit (3 per day) the server stores only your account ID, the time of the request and its size. The text is not used for advertising.

5. Where data is stored

Supabase (data center in Singapore), with access rules that let each player reach only their own records. Backups are kept for up to 30 days. Data is encrypted in transit (HTTPS).

6. Browser version

The web version on sudarev.app loads fonts and the game engine from Google servers; Google sees your IP address and browser details, as with any website. We do not use cookies or trackers.

7. Children

The game is suitable for ages 9 and up. We do not knowingly collect data from children under 13; signing in is optional and accounts are intended for users aged 13 and over.

8. Changes and contact

If this policy changes, the new version will be published on this page. Contact: [email protected].