It takes great HDR images really quick and simply with a push of the button (other apps can too). But this app has so much flexibility and does so much more that cant be found elsewhere on the iOS platform. I LOVE the ability to load any set of bracketed photos of various exposures and it produce a great HDR image. This little app on a phone can produce HDR images almost as good has my high dollar HDR desktop software such as Photomatix, Nik HDR Efex Pro 2 or EasyHDR. Most of the time I use another app on my phone that captures 3 bracketed (EV -2,0,2) high quality, unprocessed tiff/RAW files from the iPhone camera, then load them in this app for the HDR image. Do a little touch up in Photoshop Express and Snapseed and you end up with a photo that blows peoples mind that it was taken on an iPhone! When Im out and about, I also like to wireless transfer my bracketed images from my DSLR camera to my phone and then load them into this app to quickly create a HDR image to see how it will turn out while Im still out in the field.