Display specifications
The iPhone 4S was released on 14 October 2011. Its display is 3.5 inches, 320 × 480 points, which at 2x is 640 × 960 pixels. Pixel density is 326 PPI and the aspect ratio is 3:2.
Points are the unit an app's layout is written in; pixels are what the panel has. How to read these numbers.
| Release date | 14 October 2011 |
|---|---|
| Logical width | 320 pt |
| Logical height | 480 pt |
| Physical width | 640 px |
| Physical height | 960 px |
| Diagonal | 3.5 in |
| Pixel density | 326 px/in |
| Aspect ratio | 3:2 |
| Scale factor | 2x |