How ChineseGrammar handles your data

What we collect

• Sentences you submit for grammar analysis.
• The analysis result, response status, and request latency.
• A hashed anonymous identifier used for daily usage limits.
• Your Google account identifier when you sign in for a higher daily limit.
• Basic site analytics through Plausible and behavior analytics through Microsoft Clarity.

How we use it

• To return grammar feedback and track daily usage limits.
• To debug failed or low-quality analysis results.
• To improve the grammar checker and expand test examples.

What we do not do

• We do not sell your submitted sentences or Google account data.
• We do not publish your submitted sentences as public content.
• We do not store your Google email, OAuth token, or session token inside analysis logs.
• Alert emails never include your submitted sentence or analysis result.

Data retention

• After full submitted sentences and analysis results reach 30 days old, the next daily cleanup deletes them. They may therefore be retained for up to approximately 31 days.
• Anonymous logs cannot be located by your Google email. They follow the same daily cleanup schedule and may also be retained for up to approximately 31 days.
• After daily usage-limit records reach 7 days old, the next daily cleanup deletes them, so they may be retained for up to approximately 8 days.

Cookies and identifiers

ChineseGrammar uses a cookie to recognize anonymous browsers for daily limits. If you sign in with Google, Better Auth manages the login session and the checker applies the account limit to your stable user ID.

Data deletion

You can request deletion of your account by contacting us at kevinjiang0712@gmail.com. Include the Google email used to sign in. Anonymous analysis logs are not linked to that email and follow the daily expiration schedule described above.