Privacy Policy
Last updated: March 10, 2026
This policy explains what 3 to 13 stores, what it shares, and what third-party services are involved when you play on the web or use the mobile apps.
What we store to run a game
To host live multiplayer games, the service stores session state on the server. That includes game codes, player nicknames, seat order, current hands, discard and draw piles, melds, scores, and game history snapshots after a game is completed.
The apps and web client also send a device token so a player can reconnect and keep the same seat. The backend stores a one-way hash of that token rather than the raw token value.
What personal data we do not ask for
3 to 13 does not require account registration, email addresses, phone numbers, profile photos, or direct payment details to create or join a standard game session.
Purchases and Pro entitlements
If you buy a Pro upgrade in the iOS or Android app, the service may store your platform, product identifier, purchase reference, entitlement status, expiry date, and the hashed device token tied to that entitlement. Payment processing itself is handled by Apple or Google, not by this site.
Advertising
As of this version, the web experience does not include live third-party ad serving. Mobile and web ad placements may be added later. If advertising is enabled in a future release, this policy will be updated to describe the ad provider and any associated data handling.
Analytics and logs
Operational server logs may record technical events such as requests, game lifecycle events, and errors so the service can be monitored and debugged. This is used for reliability and abuse prevention, not for building advertising profiles.
Completed game history
Finished games may appear in the public history page with the game code, winner nickname, winner score, number of players, and date played. Do not use sensitive personal information as your nickname.
Children
This game is designed for family play, but players should avoid entering personal information in nicknames or chat-like fields. Parents and guardians should supervise younger players when choosing public-facing nicknames.
Changes
If data handling changes materially, this page will be updated and the date at the top will change to reflect the revision.