Privacy Policy

Effective date: November 13, 2026

This policy explains how Donghai Xu (“we”) handles information in the Mac app JWW Bridge (“the app”) and on this website.

1. Summary

The app does not collect personal information or usage data.

2. Your drawings

Drawings you open in the app and files you export are processed only on your Mac. They are never sent to us or to any third party. The app can access only the files and folders you choose in an Open panel or in Finder.

3. What we do not collect

We do not collect names, email addresses, postal addresses, location, contacts, device identifiers, advertising identifiers, usage data or analytics. The app contains no third-party code for advertising, analytics or tracking.

4. Information stored on your Mac

The following is stored only on your Mac and is never sent to us:

• Display and export settings, the list of recent files, and the list of drawings that were open last time
• Markup and the Measurement List for each drawing (the original drawing files are not changed)
• Records of the folders you have given the app access to (for drawings with linked images)
• The status of the free trial and your purchase (used by the previews in Finder)

Preview images shown in Finder are also created and stored on your Mac.

5. Free trial and purchases

Starting the free trial, purchasing and restoring purchases are handled by Apple through the App Store. Apple processes your payment information; we never receive it. We receive only aggregated sales information from Apple that does not identify you.

6. When you contact us

If you email us, we use your email address and message, including any screenshots you attach, only to reply and help you. We do not share them with third parties unless required by law.

7. Drawing files sent to us

If you send us a drawing file with your inquiry, we use it, with your consent, only to investigate the problem you reported. We do not use it for any other purpose or share it with third parties. When the investigation is finished, we delete the file.

8. Crash reports

If you have chosen to share analytics with app developers in your Mac’s System Settings (Privacy & Security > Analytics & Improvements), Apple may provide us with crash reports and other diagnostic information. This is part of Apple’s system; the app itself does not send it.

9. This website

This website uses no cookies, no analytics and no advertising. For delivering pages and for security, the web server may keep access logs (IP address, date and time, pages viewed, browser type) for a limited time. We do not use these logs for any other purpose.

10. Changes

If we change this policy, we will post the update on this page and note the revision date.

11. Contact

Donghai Xu
deven.xu@icloud.com