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The application requires a Microsoft Band wearable.
It can learn and recognize gestures. Upon a handshake gesture detection, IF the person with whom you have performed this greeting gesture also owns a band wearable + the app installed, then the two of you will automatically exchange contact details.
One can choose which contact details he or she wants to exchange.
One can choose which contacts (previously fetched by the app) to import into his contact list through the use of swipe gestures.