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Privacy Policy

Last Updated: May 2026

1. Introduction

Arknights Global Gacha Analyze is a fully open-source web tool, together with a companion Chromium extension, designed to help players export and analyze their in-game headhunting (gacha) records.

This privacy policy explains how we handle your data.

2. Data We Collect

In order to provide the export service, and only when you explicitly instruct it to, this tool reads the following specific Authentication Information from your browser, either automatically or manually:

• Your login Cookie (the Cookie used to confirm your login status)

3. How We Use Your Data

• Single Purpose: This authentication information is used solely and exclusively to send compliant API requests to Yostar's official servers in order to download your headhunting records, and is destroyed immediately once that is complete.
• No Third-Party Sharing: We will never share this information with any third-party service, advertiser, or data broker.
• No Other Uses: Your credentials will never be used to perform any unauthorized operation other than fetching your gacha records.

4. Data Transfer and Storage

Because the official API is designed with security restrictions in mind (CORS), the extension must send the authentication information it obtains over encrypted HTTPS to our Firebase server, which performs the proxied request and processing.

• Secure Transfer: All communications are HTTPS/TLS encrypted.
• No Persistent Storage of Tokens: Once our server has retrieved your records, it caches your Gacha Records — temporarily or after conversion — in our Firebase cloud database (indexed anonymously by your in-game UID alone) so that the statistics and chart features can be provided. However, your login status on the Gryphline site, your authentication Cookie and your Token are never persistently stored in our database, and are destroyed immediately once that request has been processed.

5. Extension Permissions Justification

Our Chromium extension requires the following permissions in order to operate properly and securely:

• cookies: To read the authentication Cookie on the Yostar login page you are currently signed in to.
• scripting: To run a very small, local script within the official page environment in order to extract the X-Role-Token stored in localStorage.
• activeTab: Ensures the extension is only triggered while you are on the official page and actively click the button.
• storage: To temporarily store settings or the extracted credentials on your local machine, so they can be passed to our analysis page.

6. Your Rights & Consent Revocation

Using this tool means you consent to short-term processing of auth info.

If you wish to stop using the service and revoke your consent, you only need to:

1. Click the "Logout" button on the site to clear your local login status.
2. Remove the Chromium extension.
3. (Optional) Go to the Yostar official site and log out, to invalidate the credentials you submitted.

7. Contact Us

If you have any questions, suggestions, or concerns regarding data privacy, please feel free to open an issue on the website's GitHub repository, extension's GitHub repository or APP's GitHub repository, and we will respond to you as soon as possible.

The Traditional Chinese version of these terms and notices is the authoritative version. In the event of any discrepancy between language versions, the Traditional Chinese version shall prevail.