Privacy Policy

Guest progress is stored in the browser by default. When you sign in, Clerk provides authentication and learning progress is synchronized to Redis storage for cross-device use. Nihongo Hub does not add application-layer or end-to-end encryption to that payload.

Cookies and third parties

We use Clerk, Vercel Analytics and Speed Insights, and may use Google AdSense on substantial editorial pages. Google and other vendors may use cookies to provide and measure advertising. You can manage personalized advertising in Google Ads Settings.

Data controls

Guests can clear browser data. Signed-in users can delete their account in the Clerk account panel. Contact support@20070109.xyz for questions about learning-data handling.