Privacy Policy for PDF Signature Expert

Effective Date: February 16, 2026

1. Introduction

PDF Signature Expert ("we," "our," or "us") respects your privacy. This Privacy Policy explains how our application, PDF Signature Expert, collects, uses, and discloses information.

Crucially, PDF Signature Expert is designed to process your files offline. We do not upload your PDF files, signatures, or documents to any cloud server. All file processing happens locally on your device.

2. Information We Collect

2.1. User Files and Documents

Local Processing: We access your PDF files and images only to perform the editing, signing, or scanning functions you request. These files remain on your device and are never transmitted to us.
Signatures: Any signatures you create or draw are stored locally on your device database.

2.2. Permissions

To function correctly, the app requires the following permissions:

Storage / All Files Access: Required to open, save, and modify PDF files on your device.
Camera: Required if you use the feature to scan documents or capture images for signatures.

2.3. Non-Personal Data (Third-Party Services)

While we do not collect your files, we may use third-party services to improve app stability and serve advertisements. These services may collect anonymous device identifiers (e.g., Advertising ID, Android ID) and usage data (e.g., crash logs).

Google AdMob: To display advertisements (if applicable).
Google Firebase / Crashlytics: To detect app crashes and improve performance.

3. How We Use Information

To provide the PDF editing and signing features.
To fix bugs and improve app stability.
To display non-personalized or personalized advertisements (via AdMob).

4. Data Sharing and Disclosure

We do not sell, trade, or transfer your personally identifiable information or documents to outside parties. We may share anonymous, non-personal data with third-party service providers (like Google) solely for the purposes of analytics and advertising as described above.

5. Data Security

We implement appropriate security measures to protect your information. Since your files are stored locally on your device, their security also depends on your device's security settings.

6. Children’s Privacy

Our Service does not address anyone under the age of 13. We do not knowingly collect personally identifiable information from children under 13.

7. Changes to This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page.

8. Contact Us

If you have any questions about this Privacy Policy, please contact us at:
Email: [email protected]

PDF签名专家隐私政策

生效日期：2026年2月16日

1. 引言

PDF签名专家（“我们”或“我们的”）尊重您的隐私。本隐私政策解释了我们的应用程序 PDF签名专家如何收集、使用和披露信息。

最重要的是，PDF签名专家旨在离线处理您的文件。我们不会将您的PDF文件、签名或文档上传到任何云服务器。所有文件处理均在您的设备本地进行。

2. 我们收集的信息

2.1. 用户文件和文档

本地处理：我们访问您的PDF文件和图像仅用于执行您请求的编辑、签名或扫描功能。这些文件保留在您的设备上，永远不会传输给我们。
签名：您创建或绘制的任何签名都存储在您设备的本地数据库中。

2.2. 权限

为了正常运行，该应用程序需要以下权限：

存储 / 所有文件访问权限：需要打开、保存和修改您设备上的PDF文件。
相机：使用扫描文档功能或捕获图像作为签名时必需。

2.3. 非个人数据（第三方服务）

虽然我们不收集您的文件，但我们可能会使用第三方服务来提高应用程序的稳定性和展示广告。这些服务可能会收集匿名设备标识符（例如，广告ID、Android ID）和使用数据（例如，崩溃日志）。

Google AdMob：显示广告（如果适用）。
Google Firebase / Crashlytics：检测应用程序崩溃并提高性能。

3. 我们如何使用信息

提供PDF编辑和签名功能。
修复错误并提高应用程序的稳定性。
展示个性化或非个性化广告（通过 AdMob）。

4. 数据共享和披露

我们不会将您的个人身份信息或文档出售、交易或转让给外部各方。我们可能会与第三方服务提供商（如 Google）共享匿名、非个人数据，仅用于如上所述的分析和广告目的。

5. 数据安全

我们实施适当的安全措施来保护您的信息。由于您的文件存储在您的设备本地，它们的安全性也取决于您设备的安全设置。

6. 儿童隐私

我们的服务不面向 13 岁以下的任何人。我们不会故意收集 13 岁以下儿童的个人身份信息。

7. 本隐私政策的变更

我们可能会不时地更新我们的隐私政策。我们将通过在此页面上发布最新的隐私政策来通知您任何更改。

8. 联系我们

如果您对本隐私政策有任何疑问，请通过以下方式联系我们：
电子邮件：[email protected]