Effective August 12, 2026

Privacy Policy

Mahjong Brain is designed for local play and does not build an advertising profile about you.

Information stored on your device

The app saves game progress, an in-progress board, settings, and queued anonymous gameplay events on your device. This lets play continue offline and resume after the app closes.

Anonymous product analytics

Mahjong Brain may send a limited, closed list of events such as app open, tutorial completion, board start, board completion, holder fill, hint, shuffle, and purchase-flow steps. These records use a resettable random device identifier and session identifier. The analytics database has no account field, email address, advertising identifier, precise location, contacts, or tile-by-tile board history.

Optional Sign in with Apple

If you choose to sign in, we receive and verify Apple's identity token and store the Apple account identifier needed to maintain your account. We do not store your email address. Account records can hold synced settings and verified unlock status. Sign-in is not required for free play.

Purchases

Apple processes payments. To verify or restore an unlock, the service may store purchase status and the original transaction identifier. A transaction cannot unlock two accounts. Payment-card details are never received or stored by Mahjong Brain.

Tracking and advertising

The current release does not use third-party advertising SDKs, cross-app tracking, or the advertising identifier. If that changes, this policy and the App Store privacy disclosure will be updated before the new behavior ships.

Retention and security

Local information remains until you remove the app or clear its data. Server records are retained only as needed to provide account, entitlement, fraud-prevention, and aggregate product-analysis functions. Network requests use encrypted HTTPS. Authentication and purchase verification fail closed when they cannot be completed securely.

Your choices

You may play without signing in. You can sign out in Settings, change device permissions in iOS Settings, and remove local app data by deleting the app. For an account-data request, use the support contact on the App Store listing.

Children

Mahjong Brain is not directed to children under 13 and does not knowingly collect personal information from children under 13.

Changes

Material changes will be reflected here with a new effective date and, when appropriate, communicated in the app or App Store release notes.

Contact

Use the support contact on Mahjong Brain's App Store listing for privacy questions or requests.