Privacy Policy

Overview

ZISTICA MOJIIQ (“we”, “our”) provides a Japanese writing coach as a Chrome extension and web application. This policy explains what data we collect, how we use it, and your rights.

What we collect

• Email address — collected when you create an account via Clerk, used solely for authentication and to identify your account.
• Authentication token (JWT) — stored locally in your browser via chrome.storage.local to keep you signed in across sessions.
• Correction sessions — the Japanese text you submit for correction, along with the corrections returned, are saved to your account to power your progress graph, streak, XP, and weak-spot analysis.
• Usage metadata — number of corrections per day, JLPT levels, and grammar categories of mistakes. This is used for your personal progress dashboard only.

What we do NOT collect

• We do not monitor, read, or collect text from pages you visit passively. The extension only reads text from the specific writing field you explicitly trigger it on.
• We do not collect browsing history, clicked links, keystrokes, or mouse activity.
• We do not collect financial information. Payments are processed directly by Stripe.
• We do not sell or transfer user data to third parties for any purpose other than operating the service.

How your text is used

When you trigger a correction session, the text from your active writing field is sent to our API (hosted on Vercel) and forwarded to an AI model for correction. This text is processed in real time and is not stored for AI training. The returned corrections and your session metadata (score, categories, patterns) are saved to your account for your own progress tracking.

Third-party services

• Clerk — handles sign-in and account management. See clerk.com/privacy.
• Stripe — handles payments. We never see or store your card details. See stripe.com/privacy.
• Turso — our database provider, hosted in the EU/US. Your session data is stored here.
• Vercel — hosts our web application and API. See vercel.com/legal/privacy-policy.

Data retention and deletion

You can sign out at any time from the extension popup or the dashboard, which clears your local authentication token. To request full deletion of your account and all associated data, email us at support@zistica.com. We will complete deletion within 30 days.

Children

ZISTICA MOJIIQ is not directed at children under 13. We do not knowingly collect data from anyone under 13.

Changes to this policy

We may update this policy as the product evolves. Material changes will be communicated via email or a notice in the extension. Continued use after changes means acceptance.

Contact

Questions about this policy: support@zistica.com