Scan tickets with no signal (offline mode)

Open the scanner link on the phone while it has Wi-Fi or mobile data. The scanner downloads the list of valid tickets for the event.

If the signal drops, keep scanning. Each ticket is checked against the downloaded list, and a ticket scanned twice on the same phone is flagged as already used.

When the phone is online again the scans are sent back automatically. If two phones scanned the same ticket while offline, the later scan is reported when they sync.

Tip: use more than one phone at a big gate and open the scanner on good Wi-Fi before doors open.