After reading some reviews, I hear things about not having all of the tools; I personally dont think this was meant to replace the desktop version.
It is fantastic for making exposure, colour, crop and most general adjustments.
No lens adjustments or brush adjustments? Again, not meant to replace a computer w/ mouse or cintiq.
Great app for on the go edits, especially for combination with wifi on your camera for social media post and quick posts.
FreestoneAnimation about Adobe Photoshop Lightroom for iPhone, v1.5.2