title: Various barcode reader free SDK in iOS
body: <p>I am making a barcode reader app which is free.
  I am looking for free SDK to decode 
    Datamatrix,QR,Aztec,UPC,EAN barcodes.
  I have implemented ZBar SDK as per now. Which detects QR,UPC and EAN successfully.
  I tested <a href="http://code.google.com/p/zxing/source/browse/trunk/iphone" rel="nofollow">This link</a></p>
  
  <p><a href="http://sourceforge.net/projects/zbar/files/iPhoneSDK/ZBarSDK-1.2.dmg/download" rel="nofollow">Zbar</a></p>
  
  <p><a href="https://github.com/TheLevelUp/ZXingObjC" rel="nofollow">ZXingOBjC</a></p>
  
  <p>But none of these are able to detect Aztec properly.
  With Data Matrix,UPC,EAN and QR i found Redlaser very effective but now its not free.</p>
  
  <p>Now, is there any free SDK available to detect all four barcodes without paying as i want to keep my app free on app store.</p>
  
  <p>Please suggest</p>
  
  <p>P.S  I want compatibility of scanner with latest iOS available.</p>