If you send a grimace emoji on an iPhone, it'll look like a smile on an Android

If you send a smiling emoji to your friend, it might appear as a grimace on their device.

Hannah Miller, a third-year Ph.D. student in the GroupLens research lab at the University of Minnesota, and her colleagues are publishing a study that found that the "problem can cause people to misinterpret the emotion and the meaning of emoji-based communication, in some cases quite significantly."