The Mobile Check-In app does not limit the number of visible Attendees and/or Session Attendees.
The Mobile Check-in app has a new Settings page with the new Offline Mode setting.
If the Offline Mode setting is set to “ON”, the check-in and check-out requests are stored in a queue until the Offline Mode setting is changed to “OFF” when all queued requests are processed.
If the Offline Mode setting is set to “OFF”, the check-in/check-out requests process immediately, and each Attendee’s Attendance Status is changed to "Attended." Additional requests are added to the queue until no new requests have come in for one minute when the processing starts again.