404Log - Crush Diary Privacy Policy

ghostdiary (유령일기) ("we") explains here how we handle personal information when you use the 404Log - Crush Diary app (the "app"), in line with Korea's Personal Information Protection Act and other applicable laws. For our website, see our company privacy policy. This English text is a translation; if it differs from the Korean version, the Korean version prevails.

At a glance

• No sign-up. We do not ask for your name, email or phone number.
• What you record in the app (crush profiles (name, age, MBTI and other details you enter, plus photos), diary entries and schedules) stays on your device.
• Ads: the app shows Google AdMob ads. Personalised ads appear only if you consent.

1. Information we process and why

We process only the information below and use it only for the purposes listed.

• Ads: advertising ID (Android advertising ID, iOS IDFA), IP address, device information (OS, model, language), ad views and clicks — showing ads and measuring ad performance, and personalised ads if you consent
• Email inquiries: your email address and message (kept for 3 years after the inquiry is resolved) — answering your inquiry

The outside services that receive each item, their countries and retention periods are listed under "Service providers and international transfers" below.

2. Information stored only on your device

The information you record in the app (crush profiles (name, age, MBTI and other details you enter, plus photos), diary entries and schedules) is stored only on your device and is not sent to us. We cannot see it, and it is deleted when you delete the app. If device backup (such as iCloud or Google backup) is on, it may remain in that backup.

When you record information or photos about someone else (for example, your crush), please respect their privacy. This information also stays on your device.

3. Service providers and international transfers

Some features are handled by the outside services below, whose servers are outside Korea. Information is sent to them over encrypted internet connections while you use the app.

If you do not want your information transferred abroad, you can refuse personalised ads (see below), or stop using the app. Blocking transfers the app needs to run, such as ads and analytics, may stop the app from working.

4. Sharing with third parties

We do not share your personal information with third parties, except where the law specifically requires it or investigators request it through legal procedures.

5. Personalised ads and how to opt out

On first launch the app asks whether it may track you for ads (iOS) and, where required (for example in Europe), for consent to personalised ads. If you decline, you see only non-personalised ads. To change this later:

• Android: Settings → Google → Ads → Delete (or reset) advertising ID
• iOS: Settings → Privacy & Security → Tracking → turn off the app

6. Device permissions

The app may ask for the permissions below. All are optional: if you decline, you can still use everything except that feature, and you can change them any time in your device settings.

• Photos: attaches photos you choose
• Camera: attaches photos you take
• Notifications: shows reminders scheduled on your device (not server push)

7. Retention and deletion

We delete information without delay once the retention period in the table above ends or its purpose is fulfilled. Electronic files are erased so they cannot be recovered, and paper is shredded or incinerated.

8. Your rights

You (or a legal guardian for children under 14) may ask at any time to see, correct, delete or stop the processing of your personal information. Email contact@rainghost.com and we will act without delay. You may also ask through a representative. Information stored only on your device is deleted when you delete it in the app or delete the app.

9. Children's information

The app is not directed at children under 14 (under 13 in some countries), and we do not knowingly process their personal information. If we learn that we have, we delete it without delay.

10. Security

We process only the information we need, limit who can access personal information to a minimum, and use encrypted connections when information is sent. Outside services protect information under their own security standards.

11. Privacy officer

Privacy officer: Hayoung Lee (contact@rainghost.com)
Send any questions, complaints or requests about personal information to this address. We will reply and act without delay.

12. Getting help

If you need help with a privacy issue, you can also contact these Korean agencies.

• Personal Information Infringement Report Center: 118, privacy.kisa.or.kr
• Personal Information Dispute Mediation Committee: 1833-6972, www.kopico.go.kr
• Supreme Prosecutors' Office: 1301, www.spo.go.kr
• Korean National Police Agency: 182, ecrm.police.go.kr

13. Changes to this policy

This policy applies from October 18, 2026. If it changes, we will post the new version on this page with its effective date.