A free program for Android, by Blur Photo Editor Background Changer of Photo Lab.

Blur Photo Editor Pro will help you blur out particular portions of a photograph, or apply a specific type of blur for your whole picture.

Some of its key features are: 1. The main blur tool for achieving that DSLR – or more specifically, that depth-of-field – effect. This can be utilized using the one-finger touch control2. Background eraser – a tool that helps you get rid of unsightly scenarios in the background3. Square photo editor – a tool that transforms your picture’s ratio into the uncropped, square format for Instagram