隐私政策
一句话说明
算得来不需要注册账号，不收集你的个人信息，不做广告，不追踪你，也没有接入任何第三方统计或广告工具。
学习记录只存在你的手机里
- 做题进度、收藏、课程进度、设置等，都只保存在你的设备本地，不会上传到我们的服务器。
- 你可以在 App 的「我的 → 清空学习记录」随时删除；删除 App 也会一并删除这些数据。
讲解视频
- 播放讲解视频时，App 会从我们的视频服务器下载视频文件。和所有网站一样，服务器会自动记录 IP 地址、请求时间、请求的文件等技术日志，只用于保障服务正常运行和排查故障，不用于识别你的身份，也不与其他信息关联。
- 看过的视频会缓存在你的手机里，方便下次离线观看。你可以在「我的 → 设置 → 清除视频缓存」删除。
意见反馈
如果你通过 App 里的「发送建议」给我们发邮件，我们会收到你的邮箱地址和你写的内容，只用于回复你和改进产品，不会用于其他用途，也不会提供给第三方。
未成年人
我们不会有意收集任何人的个人信息，包括未成年人。App 里没有聊天、社交或广告功能。
政策变更
如果这份政策有变化，我们会更新本页面并修改上面的生效日期。
联系我们
任何问题请发邮件到 support@xlike.ai。
Privacy Policy
In short
Unravel does not require an account, does not collect your personal information, shows no ads, does not track you, and includes no third-party analytics or advertising SDKs.
Your progress stays on your device
- Problem progress, favorites, lesson progress and settings are stored only on your device and are never uploaded to our servers.
- You can delete them anytime under “Me → Clear progress”. Deleting the app also removes this data.
Lesson videos
- When you play a lesson video, the app downloads it from our video server. Like any website, the server automatically keeps technical logs (IP address, time, requested file). These are used only to keep the service running and to fix problems; they are not used to identify you or combined with other data.
- Videos you have watched are cached on your device for offline viewing. You can remove them under “Me → Settings → Clear video cache”.
Feedback
If you email us through “Send feedback” in the app, we receive your email address and your message. We use them only to reply to you and improve the app, and never share them with third parties.
Children
We do not knowingly collect personal information from anyone, including children. The app has no chat, social or advertising features.
Changes
If this policy changes, we will update this page and the effective date above.
Contact
Questions? Email support@xlike.ai.