Retina is the best.
| OS | Width | Height | Diagonal | Resolution | |
|---|---|---|---|---|---|
| Smartphones | |||||
| iPhone 3GS | iOS | 320 | 480 | 3.5 | 165 |
| iPhone 4, 4S | iOS | 640 | 960 | 3.5 | 330 |
| Acer Liquid A1 (S100) | Android | 480 | 800 | 3.5 | 267 |
| Samsung Galaxy S | Android | 480 | 800 | 4 | 233 |
| Samsung Galaxy S II I9100 | Android | 480 | 800 | 4.3 | 217 |
| Motorola Atrix | Android | 540 | 960 | 4 | 275 |
| Galaxy Nexus | Android | 720 | 1280 | 4.65 | 316 |
| Galaxy Note | Android | 800 | 1280 | 5.3 | 285 |
| Sony Xperia P | Android | 540 | 960 | 4 | 275 |
| Tablets | |||||
| iPad 2 | iOS | 1024 | 768 | 9.7 | 132 |
| The New iPad | iOS | 2048 | 1536 | 9.7 | 264 |
| Galaxy Tab | Android | 600 | 1024 | 7 | 170 |
| Galaxy Tab 7.7 | Android | 1280 | 800 | 7.7 | 196 |