I was wondering if it’s possible to create good quality HDR photos with the iPhone. The built in camera app creates decent HDR photos and with ProHDR [iTunes App Store Link] you can take HDR photos step further.
645 Pro MK II App [iTunes App Store Link], one of my favourite camera replacement apps, has a bracketed shooting mode. It shoots three photos with different exposure settings that you select by tapping on a brighter and darker area on the screen of your iPhone.
I set 645 Pro app to save the photos in dRaw Format, which is an uncompressed TIFF. Those uncompressed TIFF files are suitable for processing with Photomatix 5 [Photomatix Homepage], my favourite HDR processing software. As a final touch, I reduced noise with Topaz Denoise 5 [Topaz Denoise Homepage].