title: aspect ratio for a game on different mobile device screens
body: <p>i am making a game on different platforms, and i need to maintain a fixed aspect ratio while rescaling the game based on different device screen sizes...</p>
  
  <p>1) so theres many different screen sizes because there are many different android, ios and blackberry devices. is there a suggested aspect ratio for all of them, a universal aspect ratio? </p>
  
  <p>2) Otherwise, do each of these device have a different screen resolution (ie 540X480, 1024X720 etc)? Does that mean i have to target only a fixed number of mobile devices (ie 5), and mathematically find an aspect ratio for the screen resolution of each mobile device?</p>
  
  <p>3) is there a more optimal way to do the above?</p>
  
  <p>much appreciated!</p>