Created by the Greek chocolate brand Lacta, the Lacta app allows users to personalize a message on one of its chocolate bars via augmented reality. The receiver sees the message when she uses the image recognition on her smartphone while holding it over the chocolate bar. As you'll see from this video, the message will appear, as will cute floating hearts.
It may be a little early for Valentine's Day, but the Lacta app will at least give you an idea of what to surprise your loved one with when the time actually comes. Alternatively, you could try it out as a sweet holiday gift. Either way, an application like this is definitely a fun, creative and cute way to personalize a message.