Privacy Policy

정본은 Notion 공개 페이지다 — DURU Privacy Policy (앱의 설정 · 로그인 링크가 여는 문서, ADR-0033). 아래 「현재 본문」은 2026-09-30 Notion에서 옮긴 사본이고, 「Notion에 반영할 수정」은 앱 · 서버의 실제 동작과 어긋나거나 빠진 자리다. 수정을 Notion에 붙이면 이 사본도 같이 고친다.

Notion에 반영할 수정 (2026-09-30)

#	자리	무엇이 어긋나나	바꿀 문장
P1	1절 Usage information 둘째 줄	사실과 반대다. GeoIP를 켰다 — IP로 나라 · 주 · 시간대를 추정하고 IP는 버린다(ADR-0029 D15, #164)	We do not collect your device model, operating system version, precise location, contacts, photos, or advertising identifier. 와 Our analytics tool uses your IP address to estimate your country, state or region, and time zone, and then discards the IP address without storing it. We do not keep your city or any more precise location. 두 줄로 바꾼다
P2	1절 Usage information 첫 줄	에피소드 이야기 · 알림 · 시각 · 세션 ID · 로그인 전 기록 연결이 빠졌다	We record how you use the App, such as which screens you open; which learning units and episode stories you start, finish, skip, or leave, and at which scene; which notifications you open, tap, or delete; and which settings you change. Each record includes the time it happened and a session identifier. After you sign in, these records are linked to your user ID, including records made earlier in the same session before you signed in.
P3	1절 끝(Information stored on your device 앞)	푸시 알림(#171)이 없다	소제목 Notifications + If you allow notifications, we store a push token for your device, which kind of App build it is, and the last time you opened the App while signed in. The push token is linked to your user ID. We use the last time you opened the App to send a reminder if you have not opened it for 3 days and again after 7 days, and we may send announcements such as new episodes. We do not put your personal information in the content of notifications.
P4	1절 Account information 셋째 줄	전화번호 로그인은 지금 숨겨져 있다(#158). 되살리면 3절에 SMS 제공자 행이 필요하다	줄을 지우거나, 남기려면 3절에 SMS 제공자 행을 더한다
P5	2절	알림 목적이 없다	To send you notifications, if you allowed them. 를 더한다
P6	3절 표 Supabase · Apple 행	알림 전달이 없다	Supabase: What they do Account, sign-in, and notification delivery · Information Account information, sign-in tokens, push token, the last time you opened the App. Apple: What they do 끝에 , notification delivery (Apple Push Notification service) · Information 끝에 ; push token and notification content
P7	4절	푸시 토큰 보존과 Apple 철회가 없다	목록에 Push token and the last time you opened the App: until you sign out on that device, delete your account, or the token stops being valid (for example, after you delete the App). 를 더하고, 마지막 문단 끝에 If you signed in with Apple, we also revoke the App's access to your Apple account. 를 더한다(계정 삭제 함수가 실제로 철회한다, #165)
P8	5절 Device permissions	알림 끄기가 없다	끝에 You can turn notifications on or off at any time under Settings > Notifications in the App, which opens your device's notification settings for the App.
P9	5절 Usage analytics	지켜야 할 약속이다 — 요청하면 PostHog의 그 사용자 기록을 지운다. 지금은 손으로 해야 한다(PostHog에서 person 삭제)	그대로 두되, 요청이 오면 할 일을 Legal의 운영 체크리스트에 둔다
P10	1절 · 3절 · 4절	학습 진행과 학습한 날짜가 서버에 저장된다(PR #180, ADR-0035 — 적용 뒤부터)	1절에 소제목 Learning progress + We store your learning progress (which lessons and story units you have completed) and the dates on which you completed at least one activity, linked to your user ID, so that your progress and learning streak carry over between devices. 3절 Supabase 행 Information 끝에 , learning progress and study dates. 4절에 Learning progress and study dates: until you delete your account.
P11	1절 · 2절 · 3절 · 4절	피드백과 에피소드 설문 답을 저장한다(ADR-0036 — 적용 뒤부터)	1절에 소제목 Feedback + If you send feedback or answer a short survey after an episode, we store your rating, any message you write, and the episode it is about, linked to your user ID. Please do not include personal information in your message. 2절에 To read your feedback and improve the App. 3절 Supabase 행 Information 끝에 , feedback. 4절에 Feedback: until you delete your account.

현재 본문 (Notion 사본, 2026-09-30)

Duru Privacy Policy

Effective date: September 30, 2026

This Privacy Policy explains how YEONWOONG JUNG (individual developer) ("we", "us") handles personal information when you use the Duru app for learning Korean (the "App").

1. Information we collect

We collect only what we need to run the App.

Account information

• When you sign in with Apple, we receive an identifier issued by Apple. We do not ask Apple for your name or email address.
• When you sign in with Google or Facebook, we receive an account identifier and the basic profile information that the provider shares by default, which may include your name, email address, and profile picture.
• When you sign in with a phone number (where offered), we receive your phone number to send you a one-time verification code by SMS.
• We create a user ID for your account and issue sign-in tokens.

Usage information

• We record how you use the App, such as which screens you open, which learning units you start, finish, or leave, and which settings you change. These records are linked to your user ID after you sign in.
• We do not collect your precise location, contacts, photos, or advertising identifier, and we have turned off location lookup from your IP address in our analytics tool.

Voice and handwriting

• Speaking exercises use your microphone. Your speech is converted to text by Apple's speech recognition, on your device when your device supports it and otherwise by Apple's servers. We do not record, store, or receive your voice.
• Writing exercises recognize your handwriting on your device. We do not receive your drawings.

Information stored on your device

• Your sign-in tokens, the app language you chose, and usage records that could not be sent yet (until they are sent) are stored on your device.

2. How we use information

• To create and keep your account and to sign you in.
• To understand how the App is used and to improve lessons and screens.
• To respond to your requests and inquiries.

We do not sell your personal information and do not use it for advertising. We do not use your information for automated decisions that have legal or similarly significant effects on you.

3. Service providers and international transfers

We use the following service providers to run the App. They process information on our behalf.

Provider	Location	What they do	Information
Supabase, Inc.	Japan	Account and sign-in	Account information, sign-in tokens
PostHog, Inc.	United States	Usage analytics	Usage information, user ID
Apple Inc.	United States and other countries where Apple operates	Sign in with Apple, speech recognition	Apple identifier; speech audio when server recognition is used
Google LLC	United States and other countries where Google operates	Sign-in with Google (only if you choose it)	Your Google account name, email address, and profile picture
Meta Platforms, Inc.	United States and other countries where Meta operates	Sign-in with Facebook (only if you choose it)	Your Facebook name, email address, and profile picture

Because some providers are outside your country, your information may be transferred to and processed in other countries, including the United States. Information is sent over encrypted connections when you use the App.

4. How long we keep information

• Account information: until you delete your account.
• Usage information: kept for up to 1 year after it is collected. After that it is no longer used for analysis.
• Information on your device: until you delete the App.

When you delete your account, we delete your account information without delay, unless we are required by law to keep it for a set period.

5. Your choices and rights

Delete your account. You can delete your account in the App at any time: go to Settings > Delete account. You can also ask us to delete it by emailing [email protected] from the email address linked to your account, or by telling us which sign-in method you used.

Other requests. You can ask us to access, correct, or delete your personal information, or to stop processing it, by emailing us at [email protected]. We will respond within 10 days.

Usage analytics. The App does not currently offer a setting to turn off usage analytics. If you email us, we will delete the usage records linked to your account.

Sign in with Apple. If you signed in with Apple, you can also stop using Sign in with Apple for the App in your Apple ID settings.

Device permissions. You can revoke microphone or speech recognition permission at any time in your device's Settings.

6. Security

We use encrypted connections and access controls offered by our service providers to protect your information. No method of transmission or storage is completely secure.

7. Children

The App is not directed to children under 14, or under the minimum age for consent to data processing in your country if it is higher (for example, 16 in some EU countries). We do not knowingly collect personal information from children under that age. If you believe a child under that age has created an account, contact us at [email protected] and we will delete the account and its information.

8. Changes

If we change this policy, we will post the new version with a new effective date. If the changes are significant, we will let you know in the App.

9. Contact

Operator: YEONWOONG JUNG (individual developer) Privacy officer: YEONWOONG JUNG Email: [email protected]