Your night stays yours.
Seoul Signal does not ask for an account, payment, email address, location or microphone permission.
Progress and settings
Your choices and sound, motion and low-data settings are stored in sessionStorage in your browser tab. Progress can be resumed for up to 24 hours. Closing the tab normally clears this storage. If storage is unavailable, the experience works in memory.
Sharing
A shared link contains the four fixed choice codes and a content version. Anyone with the link can read those choices. No name or contact information is included. Saving a card creates an image in your browser.
Measurement and hosting
The app currently sends no analytics events to an external collector and creates no persistent visitor identifier. It emits local events for development checks. Cloudflare serves the site and may process technical request data to deliver and protect it. Seven-day return visits are not measured.
Updated 8 September 2026.