Privacy policy for Durak, a card game with offline and optional online play.
Last updated: 2026-06-22
This privacy policy covers Durak, a free card game for iOS, Android, and web. Durak can be played offline against computer opponents, and also offers an optional online multiplayer mode.
Developer: Sava Stosic
Durak stores some game data locally on your device so the app can work:
Offline play uses only this on-device data and does not transmit it. You can remove it by deleting the app or clearing the app’s local storage using your device or browser controls.
Online multiplayer is optional — Durak never requires it, and offline play works
with no network connection. When you create, join, or browse online rooms, the
app connects to the Durak game server at
durak-server.sava-stosic3.workers.dev, operated by the developer on
Cloudflare’s Workers and Durable Objects platform.
What the app sends to the server. To seat you at an online table, Durak transmits:
What other players can see. Players in the same room see your nickname and avatar. If you host a public room, your nickname and the table’s basic details (game mode, deck size, and seat counts) appear in the in-app public room list that other players can browse. Durak never shows other players the cards in your hand — the server sends each player only their own hand.
Network information and Cloudflare. Connecting to the server necessarily reveals your device’s IP address and connection metadata to Cloudflare, which provides the server infrastructure and protects it from abuse. Cloudflare processes this information as our infrastructure provider under its own privacy terms (https://www.cloudflare.com/privacypolicy/).
Retention and deletion. The server keeps room and match data only for the life of the room. When a room finishes or goes idle it is deleted automatically, and a public room’s listing is removed shortly after the room is no longer joinable. The server keeps no long-term account, profile, history, or match archive. Your nickname, avatar, and player id live on your device — delete the app or clear its local storage to remove them. For any privacy question or request, contact us at the address below.
Optional accounts. You can play online as a guest (nickname, avatar, and the device player id only), or sign in with an account for a named identity, online stats, and friends — see Online Accounts below.
Online accounts are optional. You can play online as a guest, or create an account to play under a unique public username, keep online stats, and add friends across devices. Offline play never requires an account.
Authentication. Accounts use Firebase Authentication, a Google service. When you sign up or sign in, your email address and password are processed and stored by Firebase Authentication on our behalf; the developer never sees or stores your raw password. We use your email to identify and verify your account and to let you reset your password.
What an account stores. With an account, the server stores the following in Google Firestore, keyed to your account:
The developer is the controller of this data and operates it on Google’s Firebase / Firestore and Cloudflare infrastructure. We do not use it for advertising, tracking, or analytics, and we do not sell it.
Cross-device. Signing in on another device gives you the same account, username, stats, and friends. Offline stats, achievements, saved games, and cosmetics stay on each device and are not part of your account.
Safety and moderation. Usernames are user-generated and are screened against a profanity blocklist and a reserved-name list. You can report a player and block another user from the in-app Friends screen; reports are reviewed by the developer, who may remove a username or terminate an account for abuse.
Retention and deletion. Account data is kept until you delete your account.
You can delete it at any time in the app under Profile → Account → Delete
account — deletion is immediate and permanent, removing your account and
sign-in credentials, your username and its reservation, your online stats, and
your friends and blocks. If you cannot open the app, see our Delete Your
Account page (/delete-account/) or email the contact below. Limited,
non-identifying safety records (such as abuse reports) may be retained briefly
as needed to keep online play safe, and are then deleted.
Durak can generate local bug-report export data to help diagnose gameplay issues. This export is created on your device. It leaves the app only if you choose to copy or share it outside the app.
If you voluntarily send a bug report or support message, we may receive the information you choose to send and use it only to investigate the issue and respond.
Durak offers optional one-time purchases for cosmetic theme packs. They are purely cosmetic and never change game rules, bot strength, stats, skill scoring, achievements, or offline play. Separate cosmetic themes can be earned for free through achievements; the paid packs are unlocked only by purchase.
Purchases are handled entirely by the Apple App Store or Google Play. Those stores process your payment and any associated data under their own privacy policies; Durak does not receive your payment card or billing details. After a purchase, Durak stores only a local record that you own the pack and asks the store to confirm ownership when you use “Restore Purchases”.
Durak does not include third-party advertising, analytics, authentication, or social SDKs.
These providers process data under their own privacy policies. The app is also distributed through web hosting platforms, which may process data under their own policies when you use them.
Durak does not knowingly collect personal data from children. Online play and online accounts (which involve interacting with and being visible to other players) are intended for players age 13 and older. Online play lets players choose a nickname or username that other players can see; please do not include personal information in it.
If a future version changes what data Durak collects or transmits, this policy and the store privacy declarations will be updated before that version is released.
Privacy contact: sava.stosic3@gmail.com.