Cookie Policy
Last updated 15 October 2026
We keep this short because we use very little.
Strictly necessary
| Name | Purpose | Duration |
|---|---|---|
| better-auth.session_token | Keeps you signed in | 30 days |
| better-auth.session_data | Caches session details to avoid database reads | 5 minutes |
Browser local storage (not cookies)
- tg:settings: your test settings (mode, duration, font, caret, sounds, layout).
- theme: the colour theme you picked.
- tg:history and tg:lessons: results and lesson stars for guests, stored only on your device.
Analytics and advertising
We currently load no analytics or advertising scripts. If we add privacy-friendly analytics we will update this page and, where required, ask for consent first.
Control
Clear site data in your browser settings to remove everything above. Signing out removes the session cookie.