App Icon Size

for iOS:

for Appstore submission: 1024x1024

iOS 5,6
iPhone 57x57 (appicon.png), 114x114 (appicon@2x.png), retina: 120x120

Since Sep2013
for iphone: appicon.png 120x120
for iPad: appicon.png 76x76
for iPad retina: appicon@2x.png 152x152


splash screen (i.e. launch image:
iphone: 320x480 (Default.png)
iphone retina: 640x960 (Default@2x.png)
iphone retina 4": 640x1136 (Default-568h@2x.png)
ipad: 768x1024
ipad3: 1530x2048

for Android:
Splash screen:
  portrait hdpi (long): 480x800
  portrait ldpi (long):  240x400
  portrait hdpi (not long): 480x800
  portrait ldpi (not long): 240x320
  portrait mdpi (not long): 320x480

appicon: 128x128