iOS screen resolutions from an app developer’s point of view. 2007: In the beginning Back in 2007 when the first iPhone and iPod Touch were launched, iOS developers only had to worry about one resolution: 480×320. Its aspect ratio is 3:2. Life was great. 2010: The retina displays Fast forward three years and three generations later. In 2010, the iPhone 4 and iPod Touch 4th generation were launched with the first Retina Displays, which doubled the resolution of the screens. The new resolution thus was 960×640. This was great for developers as the new resolution had the same aspect ratio of Continue Reading