title: iphone automatic reference counting for iOS 4.3 version
body: <p>I am going to write app for iphone 4.X and I have to implement it quickly.I read that   automatic reference counting(ARC) manages the memory and consequently it will save my time.I have read <a href="http://hackerne.ws/item?id=3044685" rel="nofollow">this</a> article, in which saying that ARC also works for iOS 4.3. 
  Have someone such practice and how much it will be efficiently manage my application memory?
  Thanks. </p>