GitHub Repo
https://github.com/vicky7230/WallPic-Android-App
WallPic has a huge collection of HD wallpapers. The wallpapers look so sharp you'll think you've upgraded your phone. The app's interface is quite easy to use, so you can very quickly find a wallpaper you like, although there are so many to choose from, that you may find you like too many and have a tough time making a decision.
