Privacy policy / 隐私政策

Yijiang / HeadshotAirBattle · TYBB Tech

Effective: 28 October 2026. This policy covers the redesigned Yijiang mobile app. The current version is free and does not include advertising, a skin shop or in-app purchases.

Information and purpose

You can train and play without an account. Apple or Google sign-in provides an account identifier and, when supplied and verified by the provider, an email address. We do not receive your provider password. Apple authorization tokens are encrypted on our server and used to revoke authorization when you delete your account. Your nickname, selected built-in avatar, basic chessman details and match summaries are stored on our servers in the United States to provide your account and synchronize these records across devices. Apple and Google accounts are separate unless a linking feature is explicitly provided.

Models, checkpoints and full replays remain on your device. They are not uploaded for cloud storage or cloud training. Exported files are under your control. We do not request contacts, precise location, microphone or camera access for these features. Service requests expose connection information such as IP addresses; server access logs support operation, security and troubleshooting. Apple and Google process authentication under their own policies.

Retention, deletion and local records

Online account data is retained while your account is active. You can initiate permanent deletion in My → Account settings → Delete account; identity confirmation is required. Deletion removes the active account, sessions, profile and associated online chessman details and match summaries. Local chessmen and exported files remain under your control and can be removed separately. The account database backups managed by this service are scrubbed for the deleted account during deletion; unsuccessful backup cleanup is retried hourly. A minimal internal account identifier and deletion time are retained to prevent the account from reappearing after a managed database restore. This deletion record does not contain your email, nickname, model or authorization token. Operational logs may remain for service and security purposes. For requests concerning retained copies, contact service@tybbtech.com.

You can also request account or data deletion without reinstalling the app at our account deletion page. We verify ownership before acting. We do not sell personal information or use it for advertising.

Your choices and contact

Use the app without signing in; edit your profile; export or delete local chessmen; sign out; or request account deletion. For access, correction, deletion and privacy questions, contact service@tybbtech.com. Do not send passwords, verification codes or private model files. We will update this policy when the service changes.

中文说明

本政策适用于改版后的弈将 / HeadshotAirBattle。可不登录进行本机训练和对战。登录时获取Apple或Google账号标识及其提供的已验证邮箱；不获取密码；Apple授权令牌在服务器加密保存，用于删除账号时撤销授权。昵称、内置头像选择、棋手基本资料及战绩摘要保存在美国服务器。模型、训练存档与完整复盘只保留本机，导出文件由用户自行保管。本版免费，无广告、皮肤商城或内购。

账号存在期间保留在线资料。在“我的→账号设置→删除账号”中重新验证后，可删除在线账号及关联资料；本机棋手和导出文件需单独删除。本服务管理的账号数据库备份会同步清除此账号资料，失败每小时重试；保留最小内部账号标识和删除时间，避免恢复数据库时账号复活，其中不含邮箱、昵称、模型或授权令牌。服务安全日志可能仍保留，如需处理请联系service@tybbtech.com。卸载后仍可通过网页申请删除。Apple、Google分别按其政策处理认证。服务会接触IP等连接信息用于运行与安全；不出售个人资料，不用于广告。