Lazling (the "Service") treats your personal information as important and complies with the Personal Information Protection Act of the Republic of Korea and other applicable laws. This policy explains what personal information the Service collects, for what purposes it is used, and how it is protected.
| Category | Items | When collected |
|---|---|---|
| Account (sign-in) | Social sign-in identifier (Kakao/Google/Apple), nickname or name, email address, sign-in provider | When you sign in with Kakao, Google or Apple |
| Learning data | Target language, level and topic settings, saved words, study/review history, study streak | While using the Service |
| Learning input | Translations you type during review, sentences you write in "Make a sentence" | When you use review or sentence writing |
| Diary | Diary entries you write and the AI feedback on them | When you write a diary entry |
| Notifications | Web push subscription (a token issued by your browser) | When you allow notifications |
| Pre-registration | Email address | When you pre-register for a subscription (optional) |
| Error reports | Report content you enter, related learning item information | When you report an error (optional) |
| Automatically collected | Service usage records, device/browser information, access information (IP, etc.), event logs | Automatically while using the Service |
※ The Service does not store a separate password; authentication is handled solely through Kakao, Google or Apple sign-in. If you choose "Hide My Email" with Apple sign-in, the Service stores only the anonymous relay address provided by Apple.
The Service does not sell your personal information or provide it to third parties without your consent, except where there is a legal basis or a lawful request from an investigative authority.
To operate the Service, we entrust the processing of personal information as follows (including overseas).
| Processor | Entrusted work | Country |
|---|---|---|
| Vercel Inc. | Service hosting and server operation | United States |
| Upstash Inc. | Data storage (account and learning data backup, etc.) | United States |
| PostHog Inc. | Usage statistics and product analytics | United States |
| Kakao Corp. | Social sign-in authentication | Republic of Korea |
| Google LLC · Apple Inc. | Social sign-in authentication | United States |
| Anthropic PBC | Learning content generation, review translation grading, diary feedback, "Make a sentence" feedback (AI processing) | United States |
| Google LLC | Pronunciation speech synthesis (Text-to-Speech) | United States |
※ An AI model (Anthropic) is used for learning content generation, review translation grading, diary feedback and "Make a sentence" feedback. In this process the text you enter (translations, sentences you write, diary entries) is processed; account identifiers and other identifying information are not sent with it.
※ When you tap the pronunciation button (🔊), the sentence or word is sent to Google for speech synthesis. The same applies to sentences in diary feedback that you listen to; account identifiers are not sent with them.
The Service transfers personal information overseas in order to carry out the entrusted work listed in Section 5. In accordance with Article 28-8 of the Personal Information Protection Act, we disclose the following.
| Item | Details |
|---|---|
| Recipients | See the processor table in Section 5 (Vercel Inc., Upstash Inc., PostHog Inc., Anthropic PBC, Google LLC, Apple Inc.) |
| Country of transfer | United States |
| Time and method of transfer | Transmitted over the network with encryption (HTTPS) at the time you use the Service |
| Items transferred | The information necessary for each entrusted task (those items in Section 1 required for that task) |
| Purpose and retention period | To perform the entrusted work in Section 5; until the processing agreement ends or you delete your account |
| How to refuse, and the effect | You may refuse overseas transfer by contacting us at the address in Section 13. However, this work is essential to providing the Service, so if you refuse you will not be able to use all or part of the Service, including sign-up, sign-in, learning data sync and AI feedback. |
You may at any time request access to, correction of, deletion of, or suspension of processing of your personal information. You can sign out and reset learning data from the settings screen, and you can permanently delete your account and all learning data yourself under [My page] > [Delete account]. For any other request, contact us at the address below and we will handle it without delay.
Personal information is destroyed without delay once the retention period has passed or the purpose of processing has been achieved. Electronic files are deleted in a manner that makes recovery or reconstruction impossible.
The Service uses cookies and browser storage (localStorage) to keep you signed in and to improve the Service.
| Type | Purpose | If you refuse |
|---|---|---|
| Sign-in session cookie | Keeping you signed in and verifying your identity | You cannot sign in, and learning data sync and backup are unavailable |
| Analytics cookie (PostHog) | Screen usage statistics and other analysis to improve the Service | No effect on using the Service |
| Browser storage (localStorage) | Storing learning settings, wordbook and other learning data on your device | Your study records are not saved on the device |
How to refuse — You can refuse or delete cookies in your web browser settings.
※ Inside the app you can clear learning data stored on your device under [My page] > [Reset data].
The Service does not knowingly collect personal information from children under the age of 14.
Lazling provides a Chrome extension, "Lazling Save Word". The extension works as follows.
If this policy changes, we will announce the changes on this page.
This is a translation of the Korean-language privacy policy provided for your convenience. In the event of any discrepancy in interpretation, the Korean version shall prevail.