Check people in at the door — even with no signal

At big events the cell network is the first thing to fall over. The door scanner is built to keep working anyway — every admit/deny decision is made on the phone in your hand, with no round-trip to the server.

Open it:
• From Events → [your event], open Check-In. On a phone or tablet at the gate the scanner lives at /events/[event]/checkin.
• The first time it loads (while you still have signal) it quietly downloads the event's guest manifest — the list of valid tickets — so it can decide on its own from then on.

Scanning:
• Point the camera at an attendee's ticket QR. You don't tap anything — it reads, decides, and re-arms for the next person.
• Green ✓ — admitted. The ticket was valid and hadn't been used yet.
• Yellow — already checked in. This ticket was scanned before (a duplicate, or one ticket being passed around).
• Red ✕ — not valid. Unknown, refunded, or revoked ticket.

Express mode:
• For a fast-moving line, turn on Express. Successful scans flash briefly and re-arm faster so the queue keeps moving; problem scans still hold long enough to read.

Working across several gates:
• Run the scanner on as many devices as you like. Devices on the same network keep each other up to date so the same ticket can't be admitted at two gates at once. If two offline gates that couldn't see each other do admit the same ticket, it shows up later as a conflict to review — surfaced, never silently swallowed.

Catching up when signal returns:
• Every scan is saved on the device and uploaded the moment you're back online — nothing is lost if you scan a thousand people in a dead zone. Swipe up the sync panel any time to see what's queued, retry anything that failed, and force a Sync now.

See also: "How offline mode works at events — queuing, conflicts, and the sync panel."