Cookie Policy
Last updated: April 3, 2026
What Are Cookies
Cookies are small text files placed on your device by a website. They are widely used to make websites work more efficiently and to provide information to site operators. We use cookies and similar technologies in a minimal, privacy-respecting manner.
Cookies We Use
The Service uses the following cookies:
| Name | Type | Purpose | Duration |
|---|---|---|---|
astro_session | Essential / Authentication | Identifies your authenticated session after you log in. Contains a hashed session token — no personal data. This cookie is HTTP-only (not accessible to JavaScript) and Secure (transmitted only over HTTPS in production). | 14 days or until logout |
That is the only cookie set directly by the Service.
Third-Party Cookies
When you use the payment features of the Service, Stripe may set cookies necessary for secure payment processing and fraud prevention. These cookies are set by Stripe's embedded payment components and are governed by Stripe's Cookie Policy.
We do not use any third-party analytics, advertising, or tracking cookies. There are no cookies from Google Analytics, Facebook, or any advertising network.
Local Storage
In addition to cookies, the Service uses browser local storage (a client-side storage mechanism) for the following purposes:
| Key | Purpose |
|---|---|
| Language preference | Remembers your selected language (Chinese or English) |
| Profile preferences | Stores your recently used profile IDs and default profile selection locally for convenience |
| Chart settings | Remembers your preferred house system (Placidus or Whole Sign) |
| Dictionary search history | Stores recent glossary search terms for quick access |
Local storage data stays on your device and is not transmitted to our servers. You can clear it at any time through your browser settings.
Managing Cookies
You can control and manage cookies through your browser settings. Most browsers allow you to:
- View what cookies are stored
- Delete individual or all cookies
- Block cookies from specific or all websites
- Set preferences for first-party vs. third-party cookies
Please note that blocking or deleting the astro_session cookie will log you out of the Service and you will need to sign in again.
For instructions on how to manage cookies in your browser:
Changes to This Policy
We may update this Cookie Policy from time to time. Changes will be reflected by updating the "Last Updated" date at the top of this page.
Contact Us
If you have questions about our use of cookies, please contact us at [email protected].