Blitzdoku Privacy Policy

Last updated: August 23, 2026

Blitzdoku is a sudoku game with optional multiplayer. This policy covers the iOS app and the website (blitzdoku.com), which share one game server.

What we store

• Display name — the name you choose, shown to other players.
• Account credentials (optional) — if you create an account, your name and a salted password hash. Passwords are never stored in plain text.
• Recovery email (optional) — only if you add one; used solely for password reset.
• Gameplay data — puzzles played, times, mistakes, moves, and per-difficulty ratings (ELO), used for the game itself, leaderboards, and your stats.
• Push token (iOS, optional) — if you allow notifications, an Apple push token so the server can notify you about your games.
• A random player identifier — ties your games together; it is not derived from personal information.

What we don't do

• No advertising, no analytics SDKs, no trackers.
• No selling or sharing of data with third parties.
• No collection of contacts, location, photos, or anything outside the game.

Deleting your data

You can delete your account and all associated data (stats, history, ratings) at any time, in the iOS app under Settings → Player, or on the website under Account. Deletion is immediate and permanent.

Contact

Questions: support@blitzdoku.com