Digitally Imported is a pretty killer app on Windows Phone. Not only is it a great source for electronic dance music, but it’s got a few features we wish all music apps would include. What feature? Digitally Imported has a sleep timer built in. This allows you to get some chill music playing and automatically shut off after a predetermined time. Stop!Music is an app for Windows Phone that will make it so other music apps don’t need to add sleep timer functionality. Let’s check it out.