FocusTwist is a new app for iOS devices that lets you shoot Lytro-style refocusable photographs using your phone or tablet. Photographs shot using the app are interactive and dynamic in their focusing: click (or press) any area of the scene to see that area of the photograph come into sharp focus.
Lytro introduced refocus-able photos to the public when it unveiled the world's first consumer light field camera back in October 2011. Since then, a number of people and companies have been brainstorming refocus-able photo technology of their own.
One developer created a tool that can turn video footage into refocus-able stills. Toshiba and a company called DigitalOptics are both working to build Lytro-style smartphone camera modules. Next week, there's going to be a new contender: an app called FocusTwist.