Privacy Policy

juin.com (the “Service”) treats your personal information carefully and complies with applicable privacy laws. This policy explains what we collect, why, and how we store, use, and delete it.

• Required — Social account identifiers (Google, Kakao, X, Naver), email address, username, phone number
• Optional — Nickname, profile image, language settings (UI language, my language, learning language), marketing email consent
• Collected automatically — Cookies for keeping you signed in, and service usage records

• Identifying members, sign-in, and preventing duplicate accounts (one account per phone number)
• Account security and important service notices
• Responding to 1:1 inquiries and improving the service from suggestions and deletion feedback
• (With consent) Marketing email about new features and learning tips

We delete personal information when the purpose of collection and use is achieved. When you delete your account, the account and profile data (username, email, phone number, profile image, language settings) are destroyed without delay and cannot be recovered. To prevent abusive re-signup, hashes of social identifiers and phone numbers are kept for 30 days in non-restorable form and then destroyed; during that period you cannot sign up again with the same social account or phone number. Information we must keep under law (e.g. service usage or access logs) is stored separately and securely for the period required, then destroyed. To prevent impersonation with a deleted username, the username string is kept for 30 days, during which the same username cannot be registered. Feedback you left on deletion is kept only in anonymous form, detached from account data.

We do not provide personal information to third parties without your consent, except where a lawful request is made under applicable law.

For stable operation, we entrust database, authentication, and file storage infrastructure to Supabase Inc.’s cloud services. Processors may not use personal information beyond the scope of that entrustment.

• In Settings → Profile you can review your information and edit nickname and profile image.
• In Settings → Subscription & emails you can withdraw marketing email consent anytime.
• In Settings → Delete account you can request full deletion of your account and personal information; we process it without delay.

For questions about personal information processing, send a 1:1 inquiry under Settings → Support. We will review and reply.