Can you Imagine a smartphone that can tell if you're angry or sad, and react accordingly? Researchers at the University of Rochester have developed an app for that.

It's designed to measure twelve different factors, including the tone of your voice. It uses the data to determine whether you're in one of six different emotional states. It's reportedly simpler than other "emotionally intelligent" software, and smartphones won't need new sensors to use the technology.

What purpose would this technology serve? It could create mood-sensitive playlists, and adjust your phone's background. It isn't perfected yet. It still needs to "learn" each person it meets. It looks like a "sympathetic" smartphone may be just around the corner.