Privacy Policy

Last updated: July 2026

What This Server Does

Preferans Master is a real-time multiplayer relay server for the card game Preferans. It matches players in game rooms and relays game moves between devices. The host device runs the game engine; the server only forwards opaque messages.

Data We Process

• Player ID — a UUID generated on your device. It is never linked to your real identity, email, or any account.
• Display name — the name you choose when you join a room (e.g. "Alice"). Visible only to players in the same room.
• Room name — the name the host gives to a game room.
• Room password hash — if you protect a room with a password, only a SHA-256 hash is held in memory. The plaintext password is never retained.
• Room and seat state — who is in which seat, connection status, and opaque game rules set by the host.
• Relayed game moves — opaque JSON messages forwarded between host and guests. The server does not interpret or log the content of these messages.

Data We Do Not Collect

We do not collect, store, or process:

• Email addresses or user accounts
• Device identifiers, IMEI, or advertising IDs
• Location data
• Contacts or address books
• Payment information
• Analytics or behavioural tracking data

We do not use third-party analytics, advertising SDKs, or data brokers of any kind.

Data Retention

All room and player state is held in memory only and is never written to disk or a database. It is automatically removed when:

• A room is closed (host leaves or game ends).
• An open room has been idle for more than 2 hours.
• A playing room has been idle for more than 24 hours.
• The server restarts (memory is cleared).

Security

All connections use TLS (WSS / HTTPS). Room passwords are hashed with SHA-256 before being held in memory and are never transmitted back to clients.

Children

We do not knowingly collect any information from children under 13. The only personal data processed is a device-generated UUID and a freely chosen display name.

Contact & Support

Questions, bug reports, or support requests:
smagines@gmail.com