No need on iphone 6 Plus
If you have the latest iphone 6 or 6 Plus this app is totally unnecessary. Just shoot the native camera with HDR on and youll get a better image (highlights wont be washed out) with more detail and as little noise as this app produces.
If you have an older iphone, this might help some. If not, save your dollar for something else.
Hulamike about
Cortex Camera