Privacy Policy

zirizima is a free toilet finder app for Seoul, designed for foreign tourists. We respect your privacy. This policy explains what data the app uses, how it uses it, and what we never do.

Data we use

Location

The app uses your iPhone's location (via Core Location, "When In Use" permission) to compute distances to nearby toilets. The location is sent to our backend only as a one-shot lat/lng pair to query the nearest entries — it is never written to disk or logged.

You can use the app without granting location: the home screen falls back to the Gyeongbokgung area (a tourist hotspot in central Seoul).

Anonymous device identifier

On first launch, the app generates a random UUID and stores it in UserDefaults. This UUID is sent with every rating you leave so that:

• You can update an old rating you submitted, instead of duplicating it
• We can rate-limit abusive devices (5 ratings per hour max)

The UUID is not linked to your Apple ID, your iPhone serial number, your IDFA, your IP address, your name, or any other personal identifier. Deleting the app on your iPhone deletes the UUID (we have no way to recover it).

Ratings, tags, comments

When you tap "Rate" and submit, the following is sent to our backend:

• A 1–5 star rating
• Zero or more pre-defined tags (clean, busy, has_paper, etc.)
• Optional one-line comment (≤280 characters)
• The ID of the toilet
• Your anonymous device UUID (see above)
• Your selected app language ("en", "ko", "zh", or "ja")

These are stored on our backend and shown to other users as anonymous reviews ("Anonymous · 3d ago"). They are not associated with any identifier other than your device UUID.

Data we don't use

• Apple ID, email, phone number
• IDFA (advertising identifier)
• IP address (we do not log inbound IPs)
• Crash reports tied to identifiable users (no third-party crash SDK)
• Analytics cookies / usage tracking
• Photos, microphone, camera, contacts, calendar, motion, health

Where data lives

• Mobile app: Anonymous device UUID and app language preference (UserDefaults). That's it.
• Backend: Toilets dataset (public data from Seoul Open Data Plaza), areas, and the ratings users submit. Hosted on Supabase Inc., AWS Seoul region.

Third-party services

Google Maps (handoff)

When you tap "Take me there", the app opens Google Maps with the toilet's coordinates as a destination. From that moment, you are interacting with Google Maps and its privacy policy applies. zirizima sends Google nothing — it just opens a URL.

Supabase (backend host)

Our backend runs on Supabase Inc. They process the API requests we send them. They do not have access to anything beyond the toilets database and the anonymous review data described above.

Google AdMob (advertising)

We display banner advertisements on the home and detail screens via the Google Mobile Ads SDK. We do not present the App Tracking Transparency prompt and do not access your IDFA, which means AdMob serves contextual (non-personalized) ads only — they are not tailored to your behavior across other apps or websites.

To deliver these ads, Google's SDK may automatically collect: a device-scoped identifier (IDFV, scoped to zirizima only, not cross-app), coarse location at request time, diagnostic and performance data, and the user agent / device model. This data is subject to Google's privacy policy. None of it is linked by us to your ratings, your reviews, or any other identifier on our side.

If you do not want to see ads or share any data with Google, you can stop using the app and delete it.

Children's privacy

The app is not directed at children under 13. We do not knowingly collect any data from anyone, regardless of age.

Your rights

• Stop using the app and delete it. This deletes the device UUID. Past ratings will continue to exist as anonymous data — there is no way to associate them back to you, because we never associated them in the first place.
• Disable location access for zirizima in iPhone Settings → Privacy.

Changes to this policy

If we change this policy in a way that materially affects how we handle your data, we'll update the "Last updated" date above. For non-trivial changes, we'll show a notice in the app on next launch.

Contact

Questions? yumdongja@gmail.com

개인정보 처리방침

zirizima는 서울을 방문하는 외국인 관광객을 위한 무료 화장실 찾기 앱입니다. 저희는 사용자의 개인정보를 존중합니다.

수집하는 정보

위치

근처 화장실까지의 거리를 계산하기 위해 iPhone의 위치 정보를 사용합니다. 서버에는 일회성으로 위도/경도만 전달되며, 저장이나 로깅하지 않습니다.

익명 기기 식별자

앱 최초 실행 시 무작위 UUID를 생성해 UserDefaults에 저장합니다. 이 UUID는 (1) 이전에 남긴 평점 수정 (2) 분당 평점 제한 (악용 방지) 용도로만 사용됩니다.

이 UUID는 Apple ID, IDFA, 전화번호, 이메일, IP 주소 등 어떤 개인 식별 정보와도 연결되지 않습니다. 앱을 삭제하면 UUID도 같이 삭제됩니다.

사용자가 남기는 평점·태그·한줄평

"평가하기"에서 제출하는 정보:

• 1~5점 별점
• 미리 정의된 태그 (깨끗함, 붐빔, 휴지있음 등)
• 선택적 한 줄 코멘트 (최대 280자)
• 화장실 ID, 익명 기기 UUID, 선택한 언어

이 데이터는 익명으로 다른 사용자에게 표시됩니다.

수집하지 않는 정보

Apple ID, 이메일, 전화번호, IDFA, IP, 사진, 마이크, 카메라, 연락처, 캘린더, 모션, 건강 정보 등.

제3자 서비스

• Google Maps — "안내 시작" 시 외부 앱으로 핸드오프합니다.
• Supabase — 백엔드 호스팅. AWS 서울 리전.
• Google AdMob — 홈/상세 화면 하단에 컨텍스트 기반 배너 광고를 표시합니다. App Tracking Transparency 프롬프트를 띄우지 않으며 IDFA에 접근하지 않으므로, 다른 앱·웹사이트에서의 사용자 행동에 기반한 개인화 광고는 제공되지 않습니다. Google SDK는 광고 송출을 위해 IDFV(앱 단위 식별자), 대략적인 위치, 진단 데이터를 자동으로 수집하며 이는 Google 개인정보 정책의 적용을 받습니다.

문의

yumdongja@gmail.com