Do you know how to close an app on your iPhone, iPad, etc? Wait, do you really know? Because most people just think once they leave the app, it’s closed. But actually, it’s still running in the background, eating away at your battery. This kid on YouTube, who goes by the name Smark Aleck, shows you how to close out of your apps for real. Forget who’s smarter than a 5th grader! How about a pre-schooler???