Privacy Policy

Effective Date: November 3, 2026

Thank you for choosing Silverlinger and visiting our official website (collectively, “the Service”), developed and maintained by YiFeng Chen (“we”, “us”, or “our”). We respect your reading privacy and collect as little data as possible.

Section 1: Silverlinger macOS Application

1. Zero Data Collection

• No User Accounts: The App requires no account registration or login. We collect no names, phone numbers, email addresses, physical locations, or persistent device identifiers (e.g., UUID, IDFA).
• No Remote Telemetry: The App does not transmit book contents, reading duration, reading positions, bookmarks, highlights, or notes to an external server.
• No Tracking or Analytics SDKs: The App does not include third-party analytics frameworks, advertising SDKs, or background telemetry code.

2. Local Storage and Sandbox Protection

• Read-Only Source Files: When opening an EPUB from Finder, the App accesses the source archive read-only. It does not modify or overwrite the source file, or retain a permanent copy of the original EPUB in the app container.
• Local Reading State: To restore your reading state, the App stores locator data, bookmarks, highlights, and notes associated with a content fingerprint. This data remains in the Silverlinger macOS App Sandbox container and is not uploaded by the App.
• Security-Scoped Bookmarks: Under macOS App Sandbox rules, read-only file access is retained across restarts via system-standard security-scoped bookmarks explicitly authorized by you.

3. Network Communication & External Links

• Apart from checks for updates that you start, the App doesn’t contact any developer service. In the direct-download version 1.3.8 and later, choosing Check for Updates… from the app menu requests a small version file from silverlinger.app once, to compare it with the installed version. The request contains no books, reading data, or account information. The App keeps no history of checks; if a check fails, macOS diagnostic logs may record the type of failure, without books, reading data, or the response. Cloudflare processes the request and may handle the standard connection information described in Section 2.1. The Mac App Store version doesn’t include this feature; the App Store handles its updates.
• When you choose Look Up for selected text, the App hands that text to the macOS Look Up feature. The definition panel is provided by macOS, and any web search or other external content shown there is handled by the system, not by the developer’s services.
• If an EPUB contains external hyperlinks (http:// or https://), clicking one opens it in your default browser. External sites operate under their respective policies.

Section 2: Official Website & Infrastructure

1. Server Connection Logs

The website is served through Cloudflare Pages, and release downloads are provided through Cloudflare R2. Cloudflare infrastructure may process standard HTTP connection information—including client IP, User-Agent, timestamps, and requested paths—for delivery and security. We do not use this information to build individual profiles or perform cross-site tracking.

2. Local Browser Storage

The website uses no tracking or advertising cookies. We use browser localStorage solely to persist:

• Your preferred interface language (Chinese or English);
• Your preferred appearance theme (Light or Dark mode).

This preference data is stored in your local browser and can be cleared through browser settings.

3. Release Downloads

Release files are served from Cloudflare R2 through download.silverlinger.app. Download requests and delivery are processed by Cloudflare infrastructure and are subject to Cloudflare’s applicable privacy terms.

To understand how each version is downloaded, we use Cloudflare Workers to count release download requests that meet our counting rules, and keep the records in a D1 database hosted by Cloudflare. Each record contains the version downloaded, the time of the request, the country or region Cloudflare infers from the network connection, whether the request appears to come from an automated client (such as a search engine crawler or a chat app generating a link preview), and a sequence number and environment label used to manage the records. Download records do not store IP addresses, User-Agent strings, or cookies, and we set no user identifiers; they are not linked to your website visits or app use and are used only to understand download activity. Apart from Cloudflare storing and processing them as our hosting provider, we do not share these records with any third party.

The English website also provides a standard external link to the product page on Apple’s Mac App Store. Your browser contacts Apple only after you choose that link; storefront access, download, and installation are handled by Apple under its applicable privacy policy.

Section 3: General Terms

1. Children’s Privacy

The Service does not knowingly collect personal information from children under 13 (or the applicable statutory age in your jurisdiction).

2. Policy Updates & Inquiries

We may update this Privacy Policy from time to time with an updated Effective Date. For questions or privacy feedback, reach us directly at:

• Email: [email protected]