Youha Labs (CEO Young Huo Ryu) runs Jikgwan Online (jikgwan.youhalabs.com). There is no sign-up or login, and we never ask for your name, phone number or email.
1. What we process and why
Data
When and why
Kept
A random device ID made by your browser
When you get an online ticket, or heart, cheer or report a lantern: to give one ticket number per device and stop duplicates
Only a one-way hash is stored
Your IP address
When you leave a wall note or lantern, or vote: daily limits against spam
Only a one-way hash mixed with the date, deleted the next day
Nickname, in-game position and emoji
While you are online, to show you to people in the same place. Nicknames are picked from a fixed list
Not stored
Wall notes (fixed phrases)
To show on the Thank-you Jamsil wall
Until the service ends
Lantern text (up to 30 characters)
To show on the Cheonggyecheon stream
Until the service ends; hidden after 3 reports
Usage counts
To improve the service
Daily totals only, not linked to anyone
Your game progress (stamps, ticket art, settings) stays in your browser (localStorage) and is never sent to us. Clearing your browser data removes it.
2. Sharing
We do not sell or give this data to other companies.
3. Processors and international transfer
Who
What
Where
Cloudflare, Inc.
Hosting, storage and cookie-free visit statistics
USA (global data centers)
Google LLC (Google Fonts)
Font delivery; your IP address reaches Google
USA
Weather is fetched by our server from Open-Meteo for Seoul; none of your data is sent.
4. Coupang Partners
The Korean screens show Coupang Partners links in the shops and on the scoreboard. Tapping one takes you to Coupang, whose policy then applies. We earn a commission from these links.
5. Your rights
Without logins we cannot tell who left what. To remove a lantern or note you left, email hello@youhalabs.com with its text and date and we will delete it.
6. Children
We collect no names or contact details. Children under 14 should write lanterns with a parent or guardian.