title: How to reduce iPhone battery consumption while using GPS
body: <p>I am using GPS to actually monitor if I have entered a regions (radius 100 m). </p>
  
  <p>I am using a hybrid of <code>significantLocationChange</code>s and hardware GPS, <code>startUpdatingLocation</code>. </p>
  
  <p>As <code>significantLocationChanges</code> are not as accurate as I require I am using them only to check if I have entered a outer circle of X m. Then I use hardware GPS to check if the user enters an inner circle (100m). </p>
  
  <p>The problem with it is that battery is getting drained pretty quickly, can anyone help me out. </p>