Trade Mirror · Privacy Policy

Version: v1.0.2
Effective date: 1 November 2026
Applies to: Trade Mirror (Windows desktop edition)
Operator: Mr. Wu, an individual developer
Contact: wujabon@gmail.com

Summary (one sentence)

Trade Mirror does not collect and does not upload any of your trading or position data. That data lives only on your own computer, and it is stored encrypted. We have no server-side database and no technical means of reading it.

1. What we do not collect

The following information is completely beyond our reach:

The app stores the data above in a local file on your computer, encrypted with AES-256. The encryption key is also kept only on your computer. Because we cannot obtain that key, we could not open the file even if you sent it to us.

The app has no cloud account and never logs in to any server of ours. On first run it asks you to create a local account (username and password) on this machine. That account only unlocks the app on this computer, is stored solely on your own computer, and the password is never kept in plain text (only an irreversible digest is stored). It requires no phone number, no email verification, and is not linked to any third-party platform account. We can neither obtain nor view that local account.

2. What we do collect

The only information we collect is the order details you voluntarily submit when you buy a licence:

InformationRequiredPurpose
Email addressRequiredSending you the activation code; support and re-issuing after a machine change
Machine fingerprintRequiredGenerating an activation code valid only on your computer
NotesOptionalAnything you choose to tell us
Order amount, plan, order time, order numberGenerated by the platformDelivery and after-sales verification

About the "machine fingerprint": it is derived from a random installation identifier created the first time the app runs (the first 16 characters of a SHA-256 digest). It is unrelated to your hardware serial number, phone number, identity, location or IP address, and none of those can be reconstructed from it. Its only purpose is to bind an activation code to this one computer.

Beyond this policy, we do not collect any usage data by any other means (no analytics, no log uploads, no crash reporting).

3. The only two places where the app goes online

Day-to-day use of the app requires no internet connection. There are exactly two places where it makes a network request:

1) Licence expiry check

To prevent unlimited use by winding the system clock backwards, the app sends an ordinary web request to a few public websites and reads only the server time from the response headers.

That request contains nothing about you — no account, no machine fingerprint, no activation code, no device identifier, and none of our own domains. Any ordinary visit to any website produces the same kind of request. If you are offline, the app falls back to your computer's clock; everything keeps working and nothing is locked.

2) Market data

Quotes, candlestick charts and intraday charts come from public financial data interfaces (US and Hong Kong quotes via public sources such as Yahoo Finance, with a number of fallback sources), requested directly by the app on your computer.

Those requests contain only the ticker symbols you asked for. They carry no personal information and do not pass through our servers. Market data is used solely to value the records you keep locally.

Apart from these two, the app communicates with no other server.

4. What we will not do

With regard to your order information, we undertake:

5. Payment

Payments are handled by a third-party online form platform and licensed payment providers.

We never touch or store your card number, payment password, SMS verification code or any other payment credential. All we can see is the order information described in section 4 (email, fingerprint, amount, order number). How those third-party platforms handle payment data is governed by their own privacy policies.

6. Where the information is kept, and for how long

Order information is kept in the account of the third-party form platform (managed by us, visible only to us) and in our local issuance records.

Retention period: 12 months from the date your licence expires. After that we delete it. While your licence is still valid, this information is used to support you (for example, re-issuing after a machine change). You may ask us to delete it earlier at any time (see section 7).

7. Your rights

You may contact us at the email address at the end of this policy at any time to exercise the following rights:

One thing to know in advance: once the order information is deleted, we can no longer offer machine-change re-issuance or after-sales verification, because there is no record to check. If you are merely unsure about one detail, you may ask for a correction rather than deletion.

8. Minors

The app is intended for adult individual users and not for minors. We do not recommend that anyone under 18 buy or use it.

9. Security measures

We would also like to be honest about one thing: no software can guarantee absolute security. The single most important measure on your side is to look after your computer and use the app's Backup / Restore feature regularly. Because the data exists only with you, we cannot recover it if the device fails or the file is deleted by mistake.

10. Changes to this policy

The full text is available at any time in the app's About dialog, the sign-in window and the checkout page. This policy may be updated as the app changes or as the law requires; updates will be published in those same places with a new effective date. Where a change materially affects your rights, we will flag it more prominently.

11. Contact us

For any question or comment about this policy, or to exercise the rights in section 7, please write to:


Appendix: one claim you can verify yourself

Saying "we do not upload your data" is easy. You can check it: over a normal period of use, the app makes no network request other than fetching market data and opening the checkout page when you choose to. Disconnect from the internet and every feature except quote refresh keeps working.

This document ships with Trade Mirror. You may print it or save it as a PDF.