Int Meetings´ Jaume Pros presents it as "low cost technology suitable for all type of events", since today many softwares offer solutions in this regard. How does it work? The registration system generates a link for each registered delegate (many systems have this functionality today). Attendees will thus receive an email with a link and, clicking it, the passbook of their smartphone includes the registration with the graphic image of the event, the attendee´s name and the type of access.
Upon arriving to the event, or to individual rooms within the meeting, the delegate simply shows his or her smartphone and the hostesses can simply control it with another smartphone (no need for barcode readers).
Is it difficult to get people to use new technologies? Not too much: more than 70% of registered used the passbook system and welcomed the tool and the disappearance of queues. Another obvious benefit: the environment, since this solution reduces printing.
And finally, some advice: Have a few chargers. Batteries can play tricks on delegates.