Drag and Drop on mobile?

Drag and Drop on mobile?

This is not really a specific question but more a discussion.  I did drag and drop app using jquery-ui, and it doesn't work on mobile devices.  I can't find very much about this when I google.  Is this my fault or does it just plain not work?  Does any type of drag 'n' drop work on any mobile device and if so how?   Is there something you have to do to make it work on mobile?   I'm a total mobile virgin.    Thanks.