Personal Information Collection List / 个人信息收集清单
Effective date: 2026-01-20
This is a deployment-oriented transparency page. Actual collection fields may vary by instance configuration.
English
| Category | Fields | Purpose | Necessary | Retention |
|---|---|---|---|---|
| Account & authentication | Email, name, account identifiers, password hash, session tokens, email verification data | Create and manage accounts, sign-in, security, prevent abuse | Yes (basic account access) | Until account deletion; some security logs may be retained longer |
| Practice & learning | Attempts, answers, scores, feedback, learning artifacts you create in the app | Provide practice, scoring, progress, and quality improvement | Yes (core learning experience) | Until account deletion; during friends beta data may be reset |
| Technical & operations logs | Timestamps, request identifiers, error diagnostics, basic device/browser information | Reliability, security, incident investigation, audit trail for admin actions | Yes (security and stability) | As needed for security/reliability and backups |
Friends beta: we do not collect payment information at this stage.
中文
| Category | Fields | Purpose | Necessary | Retention |
|---|---|---|---|---|
| 账号与认证 | 邮箱、姓名、账号标识、密码摘要/哈希、会话标识、邮箱验证相关信息 | 创建与管理账号、登录鉴权、安全防护与防滥用 | 是（基础账号访问） | 账号注销前；部分安全日志可能保留更久 |
| 练习与学习 | 作答记录、得分、反馈、你在应用内创建的学习内容 | 提供练习、评分、进度统计与质量改进 | 是（核心学习体验） | 账号注销前；内测阶段可能重置数据 |
| 技术与运维日志 | 时间戳、请求标识、错误诊断信息、基础设备/浏览器信息 | 稳定性与安全保障、故障排查、管理员关键操作审计留痕 | 是（安全与稳定） | 按安全/稳定与备份需求保留 |
内测阶段：当前不收集支付信息。
Related: Privacy Policy · Third-party sharing/SDK directory