Updated November 6, 2026
HelloMahjong is made by ThoughtBubble Development, LLC. This policy covers our apps and the online game service at hellomahjong.thoughtbubble.dev.
Settings and learning progress stay on your device. No account is needed to play against bots or use the lessons. The app has no advertising or tracking SDKs and no in-app purchases.
Room-code games send your chosen name and game moves to the table server and other players. These tables are held in memory while the server runs.
On iPhone and iPad, Game Center sends your player identifier, display name and an Apple identity proof to our server. We use these to authenticate you and place you in the correct match. We store player identifiers, match state and reconnect records so games can continue after a connection is lost. Your device also stores a reconnect credential. Other players receive your display name and public game state, not your private hand.
Our hosting and network providers may process IP addresses and connection logs to deliver and protect the service. We do not sell your information or use it for advertising. Game Center is also subject to Apple's privacy policy.
Network play is off by default. Turning it off hides online features; it does not delete existing server records. Match and recovery data may remain on our server and in backups until removed. You can request deletion of your online game data by contacting us; we may need information to verify that the request relates to your account. You can reset local data by removing the app's stored data. Apple manages your Game Center account separately.
Email [email protected]. If you contact us, we use the information you provide to respond to your request. Do not send passwords or private identity proofs.
We will update the date on this page when this policy changes.