01一句话概括
Digitrail 不设账号系统，也没有自己的服务器。你选择的图片、你录制的屏幕内容、以及应用生成的文件，全部只在你自己的设备上处理与保存，不会传输给我们，也不会传输给任何第三方。
Digitrail has no account system and no server of its own. Images you select, screen content you record, and files the app produces are processed and stored on your device only. They are not transmitted to us or to any third party.
本政策说明 Digitrail（下称「本应用」）在 Android 平台上的数据处理方式。请在使用前完整阅读。
This policy explains how Digitrail ("the app") handles data on Android. Please read it in full before use.
02我们处理哪些数据
本应用的功能围绕你自己设备上的内容展开，不针对个人身份信息：
- 你主动选择的图片：当你进入图片拼合或截图拼接功能并选择图片时，本应用会读取你所选中的那些图片，用于拼接、排版与导出。
- 你主动录制的屏幕内容：当你启动录屏并确认系统弹出的授权提示后，本应用会采集屏幕画面，用于生成长图。
- 本应用生成的文件：拼接后的长图、分页 PDF 等成品，会写入你指定的位置或系统相册。
- 你添加的标注：时间戳、文字标注、模糊遮盖由你主动添加，并被写入成品文件。
我们不收集：你的姓名、手机号、邮箱、通讯录、精确位置、设备标识符，也不收集你的图片或录屏内容本身。
The app works on content that already exists on your device. It reads only the specific images you pick, captures screen frames only while you are recording and have confirmed the system prompt, and writes the resulting long image or PDF to a location you choose. We do not collect your name, phone number, email, contacts, precise location, device identifiers, or the content of your images and recordings.
03应用申请的权限
本应用只申请功能所必需的权限，且每一项都在你主动操作时才会被使用：
- 读取你选择的图片：仅在你在图片选取界面中确认后读取对应文件，用于拼接与导出。
- 屏幕捕获（MediaProjection）：仅在你在系统弹窗中明确确认后开始；录制期间状态栏会常驻一条通知，你可以随时从应用内或通知中停止录制。
- 写入文件：用于把生成的图片或 PDF 保存到相册或你指定的位置。
本应用不申请通讯录、短信、通话记录、精确定位、后台无障碍服务等权限。你可以随时在系统设置中撤销上述任一权限；撤销后对应功能将不可用，但其余功能与已生成的文件不受影响。
Permissions are limited to what each feature needs, and are exercised only after you act. Screen capture starts only after you confirm the system dialog; a notification stays visible while recording and you can stop it at any time. The app does not request contacts, SMS, call logs, precise location, or accessibility services. You can revoke any permission in system settings at any time.
04网络与第三方组件
本应用的核心功能完全离线可用。我们不会把任何内容上传到服务器，因为我们没有用于接收这些内容的服务器。本应用不包含广告 SDK，也不包含用于行为分析或用户画像的 SDK。
本应用内置了开源文字识别模型（PaddleOCR，Apache-2.0 许可）用于长图文字识别。该模型随应用一同分发，在设备本地运行，不会把图片发送到任何服务器。
Core features work fully offline. We do not upload content to a server, because we operate no server that could receive it. The app contains no advertising SDK and no behavioural analytics or profiling SDK. Optical character recognition is performed locally by an open-source model (PaddleOCR, Apache-2.0) bundled with the app; images are not sent anywhere for recognition. If you installed the app through Google Play, Google may collect installation and crash-related diagnostics under Google's own privacy policy, which we do not control and cannot read.
05数据存储与保留
本应用不设云端存储。你在应用内的处理记录与生成的文件都保存在本机；导出成品由你选择保存位置。应用内部的工作缓存会在处理结束后清理或被你手动清除。卸载本应用会移除应用自身的本地数据；已导出到相册或其他目录的成品文件不会被自动删除，需要你自行管理。
There is no cloud storage. Processing records and generated files live on your device, and exported output is saved wherever you choose. Internal working caches are cleared after processing or on your instruction. Uninstalling the app removes its own local data; files already exported to your gallery or a folder you chose are not deleted automatically and remain under your control.
06数据共享与出售
我们不出售、出租或交易任何用户数据。由于本应用不收集你的内容，也不设服务器，我们不存在可将这些内容对外提供的数据集。若法律强制要求我们提供信息，我们能够提供的也仅限于本政策第 02 节所列之外的信息，即：没有。
We do not sell, rent or trade user data. Because the app neither collects your content nor operates a server, there is no dataset of yours that could be disclosed. If we were legally compelled to provide information, the scope would be limited to what section 02 lists as not collected, which is nothing.
07儿童隐私
本应用面向一般用户，不针对儿童设计，也不会主动收集儿童的个人信息。由于本应用不收集任何用户身份信息，这一点在技术上同样成立。
The app is intended for a general audience, is not directed at children, and does not knowingly collect personal information from children. Since no user identity information is collected at all, the same holds by construction.
08你的权利
通常意义上的查阅、更正、导出与删除个人数据的权利，在本应用场景下由你直接行使，且不需要向我们提出请求：
- 查阅与导出：你的文件就在你的设备上，你可以随时打开、复制或分享。
- 更正：重新处理并导出即可。
- 删除：删除相册或文件目录中的成品，或在系统设置中清除应用数据、卸载应用。
- 撤回授权：在系统设置中撤销任一权限。
The rights you would normally exercise over personal data are, in this app, exercised directly by you without contacting us: your files are on your own device and can be opened, copied, shared, re-generated or deleted at any time; permissions can be revoked in system settings; and clearing app data or uninstalling removes the app's local data.
09政策变更
如果本政策发生实质性变更，我们会更新本页顶部的生效日期，并在应用更新说明中予以提示。继续使用更新后的版本，即表示你接受变更后的政策。若变更涉及数据处理的实质性扩大，我们会以更显著的方式提示。
If this policy changes materially, we will update the effective date at the top of this page and note it in the app's release notes. Continued use of an updated version constitutes acceptance. Where a change would meaningfully expand data handling, we will flag it more prominently than a release note.
10联系我们
对本政策或本应用的数据处理方式有疑问，可通过以下方式联系我们。我们通常在 5 个工作日内回复。
邮箱：contact@digitrail.net
主体：河南行润新至教育科技有限公司
地址：河南省郑州市金水区红专路 121 号 3 号楼 19 号
Questions about this policy or how the app handles data can be sent to contact@digitrail.net. We usually reply within five business days. Entity: Henan Xingrun Xinzhi Education Technology Co., Ltd., No. 19, Building 3, No. 121 Hongzhuan Road, Jinshui District, Zhengzhou, Henan, China.