After the launch of iOS 8 I wrote a simple web app and now I was wondering if startup images still make sense and if they are still used. Since I don't get a launch image in my web app I was wondering if safari still supports it under iOS 8 I used following code as it is pre-given from apple's guidelines
<link rel="apple-touch-startup-image" href="/startup.png">
See https://stackoverflow.com/a/26057714/118091
You will have specify sizes and orientation support.
<!-- iPhone 6 -->
<link href="750x1294.png" media="(device-width: 375px) and (device-height: 667px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
<!-- iPhone 6+ Portrait -->
<link href="1242x2148.png" media="(device-width: 414px) and (device-height: 736px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 3)" rel="apple-touch-startup-image">
<!-- iPhone 6+ Landscape -->
<link href="2208x1182.png" media="(device-width: 414px) and (device-height: 736px) and (orientation: landscape) and (-webkit-device-pixel-ratio: 3)" rel="apple-touch-startup-image">