It's interesting that the DoF is calculated in the app. I am wondering if this uses some known coefficients about smartphone cameras to save computation, but in any case I hope this depth mapping becomes available in plugin forms for Photoshop and other users.
As an indie filmmaker, it would save a lot of hassle to be able to shoot at infinity focus all the time and apply bokeh afterwards; of course an algorithmic version would likely never get close to what you can achieve with quality optics, but many situations where image quality is 'good enough' for artistic purposes (eg shooting with a video-capable DSLR) then faster is better.
As an indie filmmaker, it would save a lot of hassle to be able to shoot at infinity focus all the time and apply bokeh afterwards; of course an algorithmic version would likely never get close to what you can achieve with quality optics, but many situations where image quality is 'good enough' for artistic purposes (eg shooting with a video-capable DSLR) then faster is better.