We Recommend: EasyFocus App by ColorBracket, the Easiest Way to Focus/Defocus
If you want SLR-like focus and defocus effects on the photos of your Android device, then I recommend you download the EasyFocus application by ColorBracket. The app is available for free and takes up a bit under 300 k. You just need to open up your pictures in EasyFocus, play with the tools and create great focus effects, like the ones shown in the images below.
The tools include the classic editing features like image zoom in, zoom out, tap and drag, pinch and zoom, image rotation, reset and save. There’s also Circular Focus, that allows you to place a circular lens-style focus effect on your photos. You then drag it and place it where you need it. Plus, you can control the area size of the focus thanks to focus size control buttons.
There’s also a rectangular focus area effect available for photos, that allow you to drag it and place it where you need it. You can control the area size of the focus by focus size and control buttons. Selective focus allows you to customize your focus area, select the area to focus, while Focus Flip allows you to alter the focus area to unfocused area. You can download the app from here.