title: iphone - Doubts on geofencing
body: <p>I've heard of geofencing and I have some doubts. Hope you can answer some of them.</p>
  
  <p>-It's new for iOS 5.1 but what is the difference between geofencing and Using Regions? From what I've read is nearly the same, the battery drain?</p>
  
  <p>-Why can't I find apple documentation on geofencing?</p>
  
  <p>-How do you define the regions? can I add them remotely, via webservice?</p>
  
  <p>Thanks.</p>