Lacta chocolate, which has long encouraged consumers to exchange love messages on its wrappers, recently released a smart phone app that allows users to exchange personal messages. When the recipient places a Lacta bar in front of the phone’s camera, the message appears on the bar, creating the illusion that it is written on the packaging. To download the app, designed by OgilvyOne Worldwide, visit www.apps.facebook.com/LactaMobileApp.