HDR on my iPhone

[m_alamin]

Is the iPhone camera all automatic, or can you make some creative adjustments, like DOF, white balance, shutter speed, or does one rely totally on the software in the phone?

the app itself has numerous amounts of tweaks you can do, including all the ones you've mentioned (aside from shutter speed).

it also has, brightness, contrast, highlights/shadows, B/W point, white balance, saturation, blur/sharpening, lens correction, and a handful of preset effects

I think Open Camera is a best app for iOS and Android.