Edit the Focus of Lens Blur Photos After the Fact in Google Camera
Android: Google recently added a new feature to its official camera app that allows you to create a DSLR-like depth of field. What's less obvious is that you can actually edit which part of the image is in focus and how much afterwards.
The option is only available in the official camera app (meaning you can't edit this using the stock Gallery app or other photo managers like QuickPic). From the camera, swipe to the right and select the Lens Blur photo. Tap the aperture icon and you can now choose a new subject to focus on by tapping on the photo, as well as adjust the blur level with the slider at the bottom.