QuadTalk Data Deletion Requests

App: QuadTalk · Package: com.terrywi.quadtalk · Developer: TerryWi · Effective October 18, 2026

This is a translation. The Korean original is the official version; if the two differ, the Korean original prevails.

QuadTalk is a language-learning app for learning Korean, English, Japanese and Chinese together. Settings and learning records are, as a rule, stored only on your device, and the Provider runs no server of its own to keep your data. You can delete your data yourself, or request deletion, as described below.

1. Delete in the app (immediate)

• Delete all Drive backups — Passport > Account · Backup > "Disconnect account and delete backups": all backup files in the app-only folder (appDataFolder) of your own Google Drive are deleted immediately through the Google Drive API, the Drive permission given to the app is revoked, and the account is disconnected.
• Delete one Drive backup — Passport > Account · Backup > "Restore from Drive" > Delete: only the backup you choose is deleted immediately.
• Sign out — Passport > Account · Backup > "Sign out": the account connection stored on the device is deleted immediately. Drive backups remain, so you can reconnect and restore.
• Uninstall the app: all settings and learning records stored on the device are deleted with it.

2. Request deletion by email

Because the Provider runs no server that keeps your data, everything there is to delete is on your device and in your own Google Drive. If you still need help with deletion, email wwwtaekyu@gmail.com; the Provider will respond without delay (within 7 business days). Please put "Data deletion request" in the subject.

3. What is deleted and what is kept

Data	Where it is stored	How / when it is deleted	Kept after deletion
Settings and learning records (languages, birth year, goal, reminder settings, progress, stars, test results, study calendar, review cards)	Your device	Immediately when you uninstall the app	Nothing (no server copy; also excluded from Android device backup)
Google Drive backup files (JSON copies of settings and learning records)	appDataFolder of your own Google Drive	Immediately with Delete in the "Restore from Drive" list (one) or "Disconnect account and delete backups" (all)	Nothing (up to the 3 most recent are kept; created only when you tap "Back up now")
Google account information (email)	Your device	Immediately with "Sign out" or "Disconnect account and delete backups"	Nothing
Voice spoken during Speak	Not stored by QuadTalk (processed by the device's speech recognition service)	—	Subject to the speech recognition provider's policy (usually Google)
Advertising ID, IP address, device information, diagnostic data	Google AdMob (Google LLC)	Reset or delete the advertising ID / opt out of personalization in device Settings > Privacy > Ads	Subject to Google's privacy policy and retention periods

See the QuadTalk Privacy Policy for details. The Korean text of this notice is the original; if a translation differs, the Korean original prevails.

Contact: wwwtaekyu@gmail.com