Privacy policy

Effective as of: January 30, 2026

1. Identity of the Data Controller

The website sierachart.com is operated by PFORTRESS LIMITED, a private company limited by shares incorporated in Hong Kong under CR Number 79703976, with its registered office at FLAT 5, 4/F, WON HING BUILDING, 74-78 STANLEY STREET, CENTRAL, HONG KONG.
PFORTRESS LIMITED is the Data User (Controller) of your personal information collected through this website.
Contact: contact@sierachart.com

2. Collection of Personal Data

We collect and process personal data when you:

  • Create an account or place an order on our website;
  • Subscribe to our newsletter or marketing communications;
  • Contact us for customer support, live chat, or information;
  • Browse our website, through cookies and analytics tools.

The data collected may include your name, email address, billing address, country, company name (if applicable), IP address, and order details.

3. Purpose of Collection and Use

We process your personal data for the following purposes:

  • Order processing: To manage and deliver your purchases and digital products (performance of a contract).
  • Customer service: To provide assistance and respond to your inquiries.
  • Marketing communications: To send you product updates, newsletters, or promotional offers (where you have consented or indicated no objection).
  • Legal compliance: To meet accounting, tax, and legal obligations in Hong Kong.
  • Website improvement: To analyze site performance and enhance the user experience.

4. Data Retention Period

Your personal data is retained only for as long as necessary to fulfill the purposes described above:

  • Order and billing data: 7 years (statutory retention period for accounting records in Hong Kong).
  • Customer account data: until you request deletion or after 3 years of inactivity.
  • Newsletter and marketing data: until you withdraw consent / unsubscribe.
  • Cookies and analytics data: up to 13 months.

5. Data Security

We implement appropriate technical and organizational measures to protect your personal data from unauthorized access, accidental loss, erasure, misuse, or alteration, in accordance with Data Protection Principle 4 of the PDPO.

6. Sharing of Personal Data

We do not sell, trade, or rent your personal information. Your data may only be shared with:

  • Trusted service providers who help us operate our website, payment processing, or email communications (e.g., Shopify, Stripe, PayPal, email platforms);
  • Authorities or regulators, when required by law or legal request.

These third parties are contractually bound to protect your data and act only under our instructions.

7. International Transfers

As we operate globally, your data may be processed on servers located outside of Hong Kong. We ensure that any transfer of personal data outside Hong Kong is conducted in a secure manner and that third-party processors provide a standard of protection comparable to that required by Hong Kong laws.

8. Cookies and Tracking Technologies

Our website uses cookies and similar technologies to improve user experience, analyze traffic, and provide personalized content. You can manage or disable cookies via your browser settings.

9. Your Rights

In accordance with the Personal Data (Privacy) Ordinance (Cap. 486) of Hong Kong, you have the following rights:

  • Data Access Request: You have the right to request a copy of the personal data we hold about you.
  • Data Correction Request: You have the right to request corrections to any inaccurate data we hold about you.
  • Withdrawal of Consent: You may opt-out of marketing communications at any time.
  • Erasure: While not a strict statutory right in all cases under HK law, we respect requests to delete your account and personal data, subject to our legal record-keeping obligations (e.g., tax laws).

To exercise these rights, please contact us at: contact@sierachart.com
or write to: PFORTRESS LIMITED, FLAT 5, 4/F, WON HING BUILDING, 74-78 STANLEY STREET, CENTRAL, HONG KONG.

If you believe your data privacy rights have been infringed, you have the right to lodge a complaint with the Office of the Privacy Commissioner for Personal Data (PCPD) in Hong Kong (www.pcpd.org.hk).

10. Consent

By using our website and services, you consent to this Privacy Policy and to the collection and use of your information as described herein.

11. Updates to This Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or legal obligations. Updated versions will be posted on this page with a new effective date.