title: Updating iOS badge without push notifications
body: <p>I have seen a few todo apps that update their app badges at midnight, always showing the correct number of due tasks. They do this <em>without</em> the use of Push Notifications - so my question is: how do they do this? Do they use local notifications - if so, do these get called when the device is turned off? I'm a little confused and would appreciate some input.</p>