WriteTOPIK Privacy Policy

 Effective date: 2026-04-25

  WriteTOPIK is published by ZEROSTONZ.

  This Privacy Policy explains how WriteTOPIK collects, uses, and handles information when you use the app.

  1. Information We Collect

  When you use WriteTOPIK, we may collect and process:

  - Google account information used for sign-in, such as your email address, display name, and authentication-related user ID

  - Your written answers, drafts, and practice history

  - Evaluation results and feedback generated for your writing

  - Subscription and purchase-related information, such as product ID, purchase token, trial status, and subscription status

  - App usage, diagnostics, crash logs, and analytics data used to improve app stability and performance

  2. How We Use Information

  We use data to:

  - Sign you in and manage account access

  - Process writing submissions and return evaluation results

  - Save drafts and practice history

  - Verify and manage subscriptions

  - Improve app quality, performance, and reliability

  - Detect abuse and maintain service security

  3. Storage and Processing

  Some data is stored locally on your device, including drafts, settings, and practice history.

  Some data may be processed through our backend and service providers to support authentication, evaluation, billing, analytics, and crash reporting.

  4. Third-Party Services

  WriteTOPIK may use third-party services, including:

  - Google Firebase Authentication

  - Google Firebase Functions

  - Google Firebase Analytics

  - Firebase Crashlytics

  - Google Play Billing

  - OpenAI API for writing evaluation support

  These services may process data as needed to provide app functionality.

  5. Data Sharing

  We do not sell your personal information.

  We do not use third-party advertising SDKs in the app.

  We may share data only with service providers as necessary to operate the app, such as authentication, analytics, crash reporting, subscription verification,

  and writing evaluation.

  6. Data Retention

  We retain data only as long as necessary to operate the app and provide its features.

  Local drafts and history may remain on your device until removed by you, deleted through account deletion, or removed when the app is uninstalled.

  Certain backend records may be retained for security, fraud prevention, legal compliance, subscription handling, or operational purposes where required.

  7. Account and Data Deletion

  You can request account deletion from within the app.

  When you delete your account:

  - Your Firebase Authentication account is deleted

  - Related backend records used for quota, generated question data, and subscription tracking may be deleted

  - Local drafts, history, settings, and related on-device data may be cleared from the device

  Some data may be retained if required for legal, security, fraud prevention, accounting, or platform compliance purposes.

  8. Security

  We use reasonable measures to protect user data.

  Data transmitted between the app and our services is sent over encrypted network connections where supported by the platform and service providers.

  9. Children

  WriteTOPIK is not directed to children under 13.

  10. Changes

  We may update this Privacy Policy from time to time. Any updates will be reflected on this page.

  11. Contact

  ZEROSTONZ

  Email: zerostonz.co@gmail.com