Impressive improvements in medium-low light

Updated for v2.1: On the iPhone 7 Plus, this app still reigns supreme in terms of image quality for still subjects. All the cool new stuff like RAW capture and dual lens are supported.

One suggestion to get the most out of it: Use a tripod or other object to steady the phone when using this app - result will be dramatically better.

--- old review, still true ---
Have been using this app since iPhone 4; image quality is ridiculously better than any other app (... But then I have only bought 20-30 camera apps, there might be something better out there ..).
Works best (most significant difference) in medium-low lighting and works great on iPhone 6 plus after the last iOS 8 compatible update.

(Addendum: needs some work on iPhone 6 plus, some square areas show high color nice and low resolution). Hoping for a fix soon!

Jofte about Cortex Camera, v2.1