Live
How the sync works
One connection per phone, one server per show, and what happens to a guest who arrives late, loses signal, or locks their screen.
About fifteen minutes before your start time, your event is assigned to a server in a region chosen from your venue coordinates. Usually that is a machine already warm and running other shows, which takes seconds rather than minutes.
Every phone in the room holds one connection to it, and the channel is one-way: organizers and co-hosts send, everyone else listens. The server enforces that rather than trusting the app.
Video
The room mid-command: several hundred phones changing colour together, filmed from the stage.
Your media is cached on every phone well before the show, so nothing has to be fetched by nine hundred devices on the same venue Wi-Fi at the same instant.
Recovery is meant to be boring. A guest who arrives twenty minutes late, whose train went into a tunnel, or who locked their phone and came back gets the current state on connect and lands where everyone else is. Even if every single person disconnects at once, the show survives on the server for the rest of the event.