Butterfly Wallpaper for Android
I use this application is also very easy you just go into the application and then you select the image you want and then you press the button set of wallpapers that are at the bottom left.
in addition to the button set wallpaper, there is also the save button that you can use to save the wallpaper image. and then there is also a share button located on the bottom right, and the share button can be used to share images contained in this application to friends or relatives.
good luck and I hope you like this app.