In total unique count : 15 launch screens for all of possible cases
- Retina HD 5.5 : 1242 x 2208
- Retina HD 4.7 : 750 x 1334
- Retina HD 5.5 : 2208 x 1242
- 2x : 640 x 960
- Retina 640 x 1136
- 1x : 768 x 1024
- 2x : 1536 x 2048
- 1x : 1024 x 768
- 2x : 2048 x 1536
- 1x : 320 x 480
- 2x : 640 x 960
- Retina 4 : 640 x 1136
- 1x : 768 x 1004
- 2x : 1536 x 2008
- 1x : 768 x 1024
- 2x : 1536 x 2048
- 1x : 1024 x 748
- 2x : 2048 x 1496
- 1x : 1024 x 768
- 2x : 2048 x 1536
All launch screens are black, and can be used quickly to fill up your launch screen of your Xcode project.
One of benefits is to give you a quick start to properly test out on your iPhone 6/6+ as it needs a proper launch screen to let it detect its correct screen resolution, and content scale. Otherwise, your app will be based on iPhone 4' screen, and will be scaled to match iPhone 6/6+ from there thus you can't take advantage of bigger screen on iPhone 6/6+.