Privacy Policy

1. Introduction

Welcome to Mathematical Supplements. We respect your privacy and are committed to protecting the personal data you share with us. This Privacy Policy explains how we collect, use, and safeguard your information when you download our resources or place physical book orders.

2. Information We Collect

We collect information directly from you when you interact with our website. This includes:

• PDF Downloads: Email address.
• Hardcopy Orders: Full name, email address, mobile phone number, delivery address (street, unit, postal code), and optional delivery remarks.
• Feedback & Reviews: Name and any remarks or testimonials you choose to submit.

3. How We Use Your Information

We use the collected information for the following purposes:

• To send you the digital PDF version of the guidebook.
• To fulfill and ship physical book allocations to your delivery address.
• To contact you via phone or email if verification is required for PayNow payments or delivery updates.
• To improve our guidebook content and publish feedback reviews (with your consent).

4. Data Processing and Storage

Your submissions (orders, download logs, and optional feedback) are securely logged and stored in a private Supabase database. We do not sell, rent, or distribute your personal particulars to third-party marketing companies. Data is strictly accessible to the administrator for guidebook delivery and platform analytics purposes.

5. Payment Security

All physical guidebook purchases are processed securely through Stripe (supporting PayNow and major credit/debit cards). Payment information is encrypted and handled directly by Stripe Elements. We do not collect, store, or have access to your full credit card numbers or sensitive banking credentials on our servers.

6. Your Rights

You may request the correction or deletion of your order log information or email data from our systems at any time by contacting us at yangxu624@gmail.com.