title: iPhone GPS Development - Tips + Tricks
body: <p>I'm looking for some feedback, blog links, etc that offer some tips and tricks for iPhone GPS development. I've read and understand the API, I have my demo app up and running, etc but I have run into some "quirks" with gps on iphone. For example, it seems that you you will receive a lot less location updates when your iphone enters "power save" mode. I've read that you can combat this by playing music in your application [not sure if this is true]. </p>
  
  <p>It also seems that, terms of making a reasonable pedometer, you should filter out any reading with horizontal accuracies less than 20 meters. Does this sound right?</p>
  
  <p>Is there any kind of checklist out on the web for iphone gps gotchas?</p>
  
  <p>Thanks in advance.</p>