The application is called Heads, and it is a collection of different mods that can be downloaded on your device and used in-game. 

Heads is a collection of different hairstyles and faces for both men and women. All of these images are suitable for use in-game. Some of these images are from the collection of skins that are available in the game.

All of the images in Heads are designed in a simple and easy-to-use manner. In addition, all of them are in high-quality resolution.