Overview: 对影（DuoVision） is a video tool that plays video from media servers and cloud drives that you own or subscribe to. It has no accounts of ours, no ads, no analytics SDKs, and no cross-app tracking. We operate no servers and receive none of your data. (概述：对影（DuoVision） 是一款视频工具，播放的是您自己拥有或订阅的媒体服务器与网盘中的视频。它没有我们的账户体系，无广告，无统计分析 SDK，无跨 App 跟踪。我们不运营任何服务器，也不接收您的任何数据。)

What stays on your device: Server addresses and login credentials, the scanned video library index, play history, favorites, and app settings are all stored locally on your device (SQLite database and system preferences). (留在设备上的数据：服务器地址与登录凭据、扫库索引、播放历史、我的最爱，以及应用设置，全部保存在您的设备本地——SQLite 数据库与系统偏好设置中。)

iCloud sync: If you are signed in to iCloud, the following are synced through your own iCloud account using Apple's key-value storage, so they carry across your devices: server accounts (including the credentials you entered), favorites, play history, and app settings. This data goes to Apple's iCloud, never to us. You can stop it at any time by turning off iCloud for 对影（DuoVision） in system settings, and remove it via iCloud storage management. (iCloud 同步：若您已登录 iCloud，以下内容会通过您自己的 iCloud 账户、使用 Apple 的键值存储同步，以便在您的设备间通用：服务器账户（含您填写的凭据）、我的最爱、播放历史与应用设置。这些数据进入 Apple 的 iCloud，绝不会进入我们这里。您可随时在系统设置中关闭 对影（DuoVision） 的 iCloud 开关，并通过 iCloud 存储管理删除。)

Note on credentials: Server credentials are stored in the app's local preferences and, when iCloud is enabled, in your iCloud key-value store — they are not stored in the iOS Keychain. They are sent only to the server address you entered, in order to log in and stream your media. Please keep this in mind when adding accounts on a shared device. (关于凭据：服务器凭据保存在应用的本地偏好设置中，并在开启 iCloud 时保存到您的 iCloud 键值存储——未使用 iOS 钥匙串。它们仅会发送到您所填写的那个服务器地址，用于登录与播放您的媒体。在共用设备上添加账户时请留意这一点。)

Photos: The system photo picker is used only when you choose an image or video as background artwork. The app receives just the item you picked and does not request access to your whole library. (照片：仅当您挑选图片或视频作为背景素材时会用到系统照片选择器。应用只收到您所选的那一项，不会请求访问整个相册。)

No downloads or cache: 对影（DuoVision） does not provide video downloading or offline caching. Videos are streamed directly from the media servers and cloud drives you configure. No media files are saved locally by the app. (无下载与缓存：对影（DuoVision） 不提供视频下载或离线缓存功能。视频仅从您配置的媒体服务器与网盘直接串流播放，应用不会在本地保存任何媒体文件。)

Children: 对影（DuoVision） is not directed at children and does not knowingly collect information from them. (儿童：对影（DuoVision） 并非面向儿童设计，也不会主动收集儿童信息。)

Your control: You can remove server accounts, clear the scanned library, delete play history and favorites, and clear temporary playback data inside the app; revoke permissions in system settings; and delete all app data by uninstalling the app. (您的控制权：您可以在应用内删除服务器账户、清空扫库数据、删除播放历史与我的最爱、清理临时播放数据；在系统设置中撤销权限；卸载应用即可删除全部应用数据。)