Futurecam is a computational photography camera app for iOS that process 1Gb of image data per second on an iPhone 7. It can do things that SLR's can't, like changing shutter speed after capture. Check out
http://futurecam.app to find out about more features and how it works.
I ran Futurecam as a startup for 3 years and now I'm moving on, so I'm making it open source, under the MIT license.
https://github.com/kartickvad/Futurecam