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 control
2. Background eraser - a tool that helps you get rid of unsightly scenarios in the background
3. Square photo editor - a tool that transforms your picture's ratio into the uncropped, square format for Instagram