A free app for Android, by MagneticStudio.

PIX Wallpapers HD – HD and 4K Backgrounds app will let you find a perfect background image for your mobile. Each image you can download to your phone for free, no sign in and no login is needed. So you can use this application without any limitation. This is a great application for those who like high quality images and want to make their phone a beautiful and unique device. 

The wallpapers and backgrounds are optimized for almost every smartphone and tablet. You can even choose between different sizes of the images. With this app, you can find HD and 4K wallpapers for almost every category and you can download them all for free.