Cookies Policy
Effective date: April 26, 2026 Last updated: April 26, 2026
1. What this policy covers
This policy explains how TeachLex uses cookies and similar technologies on teachlex.com and within the TeachLex web application. It supplements our Privacy Policy, which is the primary document describing how we handle personal data overall.
2. What cookies are
A cookie is a small text file stored by your browser when you visit a website. It allows the site to recognize your browser on subsequent visits, for example, to remember that you are logged in, or that you previously dismissed a notice.
We also use a small amount of similar storage in your browser (localStorage and sessionStorage) for things like remembering UI preferences. Where this policy refers to "cookies", treat that as covering both cookies and these similar storage mechanisms.
3. Our approach
TeachLex uses only the cookies necessary to make the service work. We do not use cookies for advertising, retargeting, behavioral tracking, or third-party analytics profiling on the application. We tell you that explicitly because most websites do the opposite, and we think the difference matters.
This is also why TeachLex does not display a cookie consent banner. Under Japanese privacy law (APPI), the EU ePrivacy Directive, and most other frameworks, banners are required when a site sets non-essential cookies, primarily advertising and tracking cookies. Since we set neither, the banner would be performative rather than meaningful.
If we ever introduce non-essential cookies, we will update this policy, notify you in advance, and add appropriate consent controls before activation.
4. The cookies we set
| Cookie name | Purpose | Set by | Lifetime |
|---|---|---|---|
sb-*-auth-token | Keeps you logged in. Set by Supabase as part of the authentication system. | Supabase | Until you sign out, or up to one year if you check "remember me" |
sb-*-auth-token-code-verifier | Used during the OAuth sign-in flow to verify the authentication response. | Supabase | A few minutes; deleted automatically after sign-in completes |
teachlex.sidebar-state | Remembers whether you have the sidebar open or collapsed. | TeachLex | One year |
teachlex.theme-preference | If applicable, remembers your light or dark mode preference. | TeachLex | One year |
The exact list of authentication cookies set by Supabase may change as Supabase updates its libraries. The purpose, keeping you signed in safely, does not.
5. Third-party cookies
When you sign in with Google, Google may set its own cookies on its own domains as part of completing the OAuth flow. We do not control those cookies, and they are governed by Google's own privacy and cookies policies:
If you choose to import a class roster from Google Classroom, the same applies. Google's domains are involved in that flow and Google's policies apply to those interactions.
We do not embed any other third-party content (advertising networks, social media widgets, video players, comment systems) on the application that would set cookies.
6. The marketing site
The TeachLex marketing pages, including the homepage, the legal pages including this one, and any future content pages, are kept deliberately lightweight. They do not currently set analytics, advertising, or tracking cookies.
If we add a privacy-respecting analytics tool in the future (for example, Plausible, Simple Analytics, or Vercel's first-party analytics), we will update this policy first to describe what the tool collects, where the data is processed, and what your options are.
7. Controlling cookies
You can control cookies through your browser settings. Most browsers let you:
- See what cookies are stored
- Delete individual cookies or all cookies
- Block cookies from specific sites
- Block all cookies (this will prevent you from staying signed in to TeachLex)
If you sign out of TeachLex, the authentication cookies are removed automatically. If you delete your account, all cookies set by TeachLex on your browser become orphaned and will expire on their own. They cannot be used to identify you.
8. Local and session storage
In addition to cookies, TeachLex uses a small amount of localStorage and sessionStorage in your browser to:
- Cache UI state during a session (for example, which tab is open in a multi-tab view)
- Remember temporary form input so a brief connection drop does not lose your work in progress
These are stored only on your device and are not transmitted to our servers as part of normal browsing. Clearing your browser's site data for teachlex.com clears them.
9. Changes to this policy
We will update this policy when our use of cookies changes. When we do:
- The "Last updated" date at the top will change
- For material changes (for example, the introduction of any new analytics or third-party cookies), we will notify you by email at least 14 days before the change takes effect
10. Contact
For questions about this cookies policy, email privacy@teachlex.com.
James Saunders-Wyndham Operator, TeachLex Osaka, Japan