Cookie Policy
Last Updated: April 24, 2026 · Effective: April 24, 2026
1. What Are Cookies
Cookies are small text files that are placed on your computer or mobile device when you visit a website. They are widely used to make websites work more efficiently and to provide information to the website operators. Cookies can be "persistent" (remaining on your device until they expire or you delete them) or "session" (deleted when you close your browser).
2. Our Approach to Cookies
Keystir takes a minimal approach to cookies. We use only essential cookies required for the core functionality of the Service, along with a small number of preference cookies to remember your settings. We do not use third-party advertising or behavioral tracking cookies.
3. Categories of Cookies We Use
3.1 Strictly Necessary Cookies
These cookies are essential for the operation of the Service. They enable core functionality such as authentication and security. The Service cannot function properly without these cookies, and they cannot be disabled.
| Cookie | Provider | Purpose | Duration |
|---|---|---|---|
| sb-*-auth-token | Supabase | Stores your authentication session token, allowing you to remain logged in. | Session / persistent (configurable) |
| sb-*-auth-token-code-verifier | Supabase | Used during the PKCE authentication flow for secure magic-link login. | Session |
3.2 Preference Cookies
These cookies remember your settings and preferences to provide a personalized experience. They are not required for core functionality but improve your experience.
| Cookie / Storage Key | Type | Purpose | Duration |
|---|---|---|---|
| reading-mode | localStorage | Stores your preferred reading mode (standard, large text, high contrast) for accessibility. | Persistent |
| preferred-language | localStorage | Stores your preferred language selection (English, Spanish, Portuguese, Korean, Mandarin, Hindi, Tagalog). | Persistent |
3.3 Analytics Cookies
At this time, Keystir does not use third-party analytics cookies. If we introduce analytics in the future (such as privacy-respecting analytics tools), we will update this policy and notify you accordingly. Any analytics we implement will prioritize privacy-first, cookie-free solutions where possible.
4. Third-Party Cookies
We do not allow third-party advertising networks to set cookies on our Service. The only third-party cookies present on keystir.com are the Supabase authentication cookies described above, which are set by our authentication provider as part of the login process and are classified as strictly necessary.
If you follow links from Keystir to third-party websites (such as LemonSqueezy for payment or Printful for merchandise), those websites may set their own cookies subject to their own cookie policies. We have no control over third-party cookies set outside of keystir.com.
5. How to Manage Cookies
You can control and manage cookies through your browser settings. Most browsers allow you to:
- View what cookies are stored and delete them individually.
- Block all cookies or only third-party cookies.
- Set preferences for certain websites.
- Clear all cookies when you close your browser.
Please note that if you block or delete the strictly necessary authentication cookies, you will not be able to log in to or use the Service.
For more information on managing cookies in specific browsers:
- Chrome:Settings → Privacy and Security → Cookies and other site data
- Firefox:Settings → Privacy & Security → Cookies and Site Data
- Safari:Preferences → Privacy → Manage Website Data
- Edge:Settings → Cookies and site permissions → Cookies and site data
6. Local Storage and Similar Technologies
In addition to cookies, we use browser local storage to persist your preferences (such as reading mode and language). Local storage data does not expire automatically but can be cleared through your browser settings or by clearing site data for keystir.com.
7. Changes to This Cookie Policy
We may update this Cookie Policy from time to time. When we make changes, we will update the "Last Updated" date at the top of this page. If we introduce new categories of cookies (e.g., analytics), we will notify you via the Service and update this policy before deploying them.
8. Contact Us
If you have questions about our use of cookies, please contact us:
See also our Privacy Policy for full details on how we handle your personal information.