A free program for Android, by OnePlus Ltd..

This icon set from OnePlus Icon Pack – Oxygen consists of minimal looking, round shaped icons with soft shadows and perception of depth that is plain in appearance. This is a collection of icons in the manner of pixel-pie icons which makes your screen look clean and simple.

If you no longer want those shiny wallpaper backgrounds, this is the perfect app for you. This makes your phone look very neat and at the same time, your icons are very visible so you can click the icons you want to use easier. This is also free of charge and can be used immediately once downloaded.