Can someone tell me what the ideal resolution for images are for an iPhone/iPad and iPhone(Retina)/iPad(Retina). I have pulled these measurements off of the Apple Website and Wikipedia. See Below: Regular iPhone 480 x 320 - 163 ppi iPhone Retina Display 960 x 640 - 326 ppi. iPad 2: 1024 x 768 - 132 ppi iPad 3 (retina display): 2048 x 1536 - 264 ppi Thank you would really appreciate for some assistance!